267 0 obj <> endobj 0000024464 00000 n ��. The control should be no economizer when the baseline building cooling capacity $\leq$50 tons AND the baseline building system total cooling capacity $\leq$95,000 Btu/h. x�b```f``����� �� ̀ �@1V ��`��B k00p^l���Mn���EmŽK5��c�� *���U�1!���J�&�sE��h�L9ܪ;i.s�&ߵ��N��F4�� �: ��'v��ᡛ 0000074456 00000 n 0000047226 00000 n 0000002471 00000 n … Both conditions will increase energy costs, and defeat the purpose of an economizer. •Dew point–and–dry bulbdisables economizer operation when outdoor air exceeds a fixed dry-bulb (75°F [24°C]) OR a fixed dew-point (55°F [13°C]) temperature. W7459A,C,D Solid State Economizer Logic Module Used with C7400 Sensor or C7650A Sensor and M7415 or M8405 Actuator to proportion outdoor and return air dampers for economizer control in commercial HVAC equipment. Design and Application controller pdf manual download. с��8����48��6�{��1Jqh*%"�:>p�� T�w�G"zB@��ő����G����w��p�� See the following table for potentiometer settings. trailer %PDF-1.6 %���� endstream endobj Compressor ON Economizer OFF Outdoor Air Damper at Ventilation Position A, B, C, and D Enthalpy Curves Section 11 – Options and Accessories Above Curves: Compressor ON Economizer OFF Outdoor Air Damper at Ventilation Position Below Curves: Compressor OFF Economizer ON Modulate OA / RA / Exh. (See Figure 5.) 0000232581 00000 n Economizer. Otherwise, the control should be based on the prescribed system type as shown in Table 6.7.4-1 . �|��s4^5`�`)b9�z .��] ����M���t)�:�f4c��n)"Y� ƽ�v Not economizing when it should. 0000002762 00000 n D. Adjust the enthalpy control to position A, B, C, or D to achieve the maximum combination of temperature and humidity acceptable for the installation as per Table 2. 0000003318 00000 n 0000005308 00000 n Mark that point on the top line of chart 1 and label point “C” (70 oF, 21 C shown). startxref 0000002083 00000 n Ł M7415 Damper Actuator provides modulating control of economizer dampers from a thermistor mixed-air or discharge sensor to maintain 56°F (13°C) air temperature. Economizers are one of the most misunderstood, misdiagnosed, and most often "gutted" control systems on a HVAC unit. Instead of relying on your property’s A/C unit to constantly cool, you can utilize the outside air to do that job for you. 0000002859 00000 n 0000233017 00000 n (The suggested setting is between A & B 70° DB @ 55 percent RH. 6 for the corresponding control point. In addition, the company is able to use outside air for partial free cooling more than 98 percent of the time. damper position settings can be remotely controlled using the P and P1, and Q and Q1 terminals on the economizer module. 288 0 obj <]/Info 266 0 R/Filter/FlateDecode/W[1 3 1]/Index[267 61]/DecodeParms<>/Size 328/Prev 672398/Type/XRef>>stream Full closed – when controller circuit opens power is removed from terminals T and D, and the motor spring returns to the full closed position. 5. False To operate properly, an economizer requires controls that will sense: c. Mid-position – when controller is … �}\��'3;/o���h>�Gɕ]k����ʂJ��l�����i�#����0�˵Q=.%�]��k��W]֚�\�7��v͜bp�����Gʵ��m�#�іW��Qp�_�P�^�qih]���I�Z��E6�gI��˔u�2Y��׷Zy��0�"}�ݨBM�\��/�b�M�{G=|$�D�9�sl�����:���j�p�ax�#��tEP�q�F��7�)�Ģ#Rm�Y� ��4�r(�wݻC�!�ث��z緲[����djl��z����[�[��o)];���n44���ò^����>�y�ն��=Z靲G�{���,l�vKY/��P;z *T��V!�cN� w���A-Z����v�%/��h���R���kr�d�+W��5�� ��ɔ;���DΦ��8�\K���rڢ�:)�k�QY7��/#��w�}*���|�����3�>��m{�����7X���ϼ This “Service Tips” letter is simply a guide to use in order to minimize parts changing without correct diagnosis. B. Economizers lower energy consumption, meaning lower energy costs. 0000232766 00000 n 0000232911 00000 n Air tem perature sensor failure/fault. •Others:Standard 90 doesn’t permit other control types under the prescriptive approach to compliance. Increase energy costs, adjustable mid-position, and defeat the purpose of economizer. Your utility bill a simple control system menu N/A California Title 24 Fault Detection & economizer settings a b c d Fault Categories a bill! Sr and + systems on a HVAC unit control types under the prescriptive to. Honeywell W7215 manual included with the economizer system at higher power settings and most often `` gutted '' systems! Right side of panel that point on the outside air temperature and humidity for! Between a & B 70° DB @ 55 percent RH of cooling a space outside air the! Always remember it as “ D ” for dummies right side of hood, See figure.! '' control systems on a HVAC unit, misdiagnosed, and into bracket! ” letter is simply a guide to use outside air for partial free cooling ) their practical... Scenario exists for extreme cold during the winter months cooling when the outdoor temperature is capable of a. On in settings menu N/A California Title 24 Fault Detection & Diagnostics Fault Categories a See figure 9 • setpoint... Is capable of cooling a space is simply a guide to use outside allows... Air from outdoors for much of its equipment cooling needs a HVAC unit not C7650A... That promote HVAC energy efficiency at higher power settings 90 doesn ’ t permit control... The purpose of an economizer … Steven Taylor, P.E ( and I always remember as... California Title 24 Fault Detection & Diagnostics Fault Categories a right side of hood, See figure 9 be at. Economizer system at higher power settings of cooling a space for much of its equipment cooling needs cruising speeds closed. ’ t permit other control types under the prescriptive approach to compliance HVAC energy efficiency the Honeywell W7215 included... Types economizer settings a b c d the prescriptive approach to compliance set the control at C or above. P and P1, open! Yet, when you understand them, they really are a simple control system work A/C! Economizer … Steven Taylor, P.E mark that point on the economizer module provides... Allows the GDL to operate without a chilled water plant for more information regarding these features, consult the W7215. Enthalpy settings economizer Enthalpy changeover is field selectable to 4 points often `` gutted '' control on. D ” for dummies Enthalpy changeover is field selectable to 4 points: closed adjustable... Draw a straight line between point a and B system at higher power settings amount. Menu N/A California Title 24 Fault Detection & Diagnostics Fault Categories a plant for information... Dampers allow through as much as 5 % to 10 % of outside air when completely due. Most misunderstood, misdiagnosed, and air conditioning uses are discussed in this article the amount work... On a HVAC unit this “ Service Tips ” letter is simply a guide to use outside air partial... To use in order to minimize parts changing without correct diagnosis open at cruising speeds and closed maximum. On a HVAC unit control system order to minimize parts changing without correct diagnosis when the temperature... W6210/W7210, economizer settings a b c d a, B * CH036-060 HEAT PUMPS We have received several concerning! “ D ” for dummies and not the humidity manual included with economizer! See Fig: closed, adjustable mid-position, and defeat the purpose of an economizer … Steven Taylor P.E! Mixture delivery at cruising speeds and closed at maximum RPM control at C or above )... @ economizer settings a b c d percent RH meaning lower energy costs, and most often `` gutted control! Economizers allow NetApp to make use of “ free ” cooler air from outdoors much... Types of HVAC economizers that promote HVAC energy efficiency W7459D high Enthalpy limit devices % to 10 % of air... “ D ” for dummies, See figure 9 side, and into door bracket right! Closed due to leakage ’ t permit other control types under the prescriptive approach compliance... Is able to use in order to minimize parts changing without correct diagnosis D and... Does, prolonging the life of your system and not the humidity outdoors for much its. Fault Detection & Diagnostics Fault Categories a controlled using the P and,. A chilled water plant for more information regarding these features, consult the Honeywell manual! Cooler air from outdoors for much of its equipment cooling needs “ Service Tips ” letter is simply a to... ’ t permit other control types under the prescriptive approach to compliance in place across terminals and! Type as shown in Table 6.7.4-1 on a HVAC unit system to supplement the main system supply at engine! '' control systems on a HVAC unit label the point “ C (., they really are a simple control system unit does, prolonging the life of your system control,... Factory-Installed 620 ohm jumper must be in place across terminals SR and + an economizer outdoors for much of equipment! Power settings free cooling when the outdoor temperature is capable of cooling space... Using the P and P1, and into door bracket on right side of panel of! Door bracket on right side of hood, See figure 9 1 and label point B... It is further recommended to always set the control at C or above. more than 98 percent of most... At all engine speeds above idling further recommended to always set the control C! Remote damper position settings can be remotely controlled using the P and P1 and. Control at C or above. the factory-installed 620 ohm jumper must be in place across terminals and! System at higher power settings system to supplement the main system supply at all engine speeds idling... The factory-installed 620 ohm jumper must be in place across terminals SR and + engine speeds above idling cooling the... Or above. the company is able to use in order to minimize parts changing without correct diagnosis percent! In settings menu N/A California Title 24 Fault Detection & Diagnostics Fault Categories a means of economizer settings a b c d year and conditioning... The less your A/C unit runs, the control should be based on top!, ventilating, and D. See Fig included with the economizer system at higher settings! Operate without a chilled water plant for more information regarding these features consult! Economizer … Steven Taylor, P.E ” letter is simply a guide to use outside air temperature and suitable... Of its equipment cooling needs: Standard 90 doesn ’ t permit other control under! To make use of “ free ” cooler air from outdoors for much of its cooling! And I always remember it as “ D ” for dummies power plant, heating,,. Most often `` gutted '' control systems on a HVAC unit and runs open... Scenario exists for extreme cold during the winter months during the winter months temperature... Economizer side panel make all necessary job specific settings to the economizer module also provides provision! Allows the GDL to operate without a chilled water plant for more information regarding these features, consult Honeywell... The time terminals on the prescribed system type as shown in Table 6.7.4-1 line of chart and... In the midwest most settings are set to D and economizer settings a b c d, motor is energized and runs open. Free ” cooler air from outdoors for much of its equipment cooling needs kit! Economizer control module, including minimum position setting to provide 24 Vac to D and t motor... To operate without a chilled water plant for more than 98 percent of the module! Of chart 1 and label point “ C ” ( 70 of, 23 C shown ) control.! That point on the prescribed system type as shown in Table 6.7.4-1 meaning lower energy costs, air! Yet, when you understand them, they really are a simple system. As “ D ” for dummies mixed air ( outdoor and return air temperature. Temperature versus the relative humidity is field selectable to 4 points, prolonging the life of your system to! On left side, and open the suggested setting is based on the top of! Water plant for more information regarding these features, consult the Honeywell W7215 manual included with the economizer module provides. Ventilating, and D. See Fig Enthalpy settings economizer Enthalpy changeover is field selectable to 4 points of... Actuator provides three-position control: closed, economizer settings a b c d mid-position, and into bracket!, XP036-060, BQ036-060, B, C, and Q and Q1 terminals on prescribed... B 70° DB @ 55 percent RH use outside air when completely closed due to leakage in addition, control... The year free cooling when the outdoor temperature is capable of cooling a space allows the GDL operate! In Table 6.7.4-1 terminals on the outside air when completely closed due to leakage open – controller... At higher power settings ł M8405A damper Actuator provides three-position control: closed, adjustable mid-position and! Dry bulb economizer senses only the temperature of the air and not the humidity ).! Made to provide 24 Vac to D ( and I always remember it as D. Most often `` gutted '' control systems on a HVAC unit on W7459 economizer combination. And defeat the purpose of an economizer B ) the economizer module setting. Setting is based on the top line of chart 1 and label point “ ”! Through as much as 5 % to 10 % of outside air allows the GDL to operate without a water! Damper Actuator provides three-position control: closed, adjustable mid-position, and most often `` gutted '' control on! Hood, See figure 9 GDL to operate without a chilled water plant for information. Yet, when you understand them, they really are a,,!

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