10902 17TH PL W 2025-01-06 - Laserfiche WebLink

SYSTEM SUPERHEAT Ambient Condenser Return Air Temperature( 50%RH ) Inlet Temperature Drybulb Wetbulb Drybulb Wetbulb Drybulb Wetbulb Drybulb Wetbulb Drybulb Wetbulb (°C Drybulb ) 18° 1 T 21° 14° 24° 17° 27° 19° 29° 22° 46 --- --- --- --- 3 38 --- --- --- 3 3 35 --- --- 3 3 5 32 --- --- 3 6 6 29 --- 3 3 7 9 27 3 3 3 10 11 24 3 3 6 11 12 21 3 3 8 13 14 18 3 6 11 14 16 16 4 8 12 16 17 NOTE: * Charge 3° super heat, all other could be# 1.1°C TABLE IV -System Superheat A CAUTION 6. Turn the fan switch to the "Auto" position. The blower should stop 90 seconds later. To prevent personal injury, carefully connect and disconnect manifold gauge hoses. Escaping liquid refrigerant can cause Note: If outdoor temperature is below 12.8°C, proceed to burns. Do not vent refrigerant into the atmosphere. Recover step 9. Do not check out in the cooling mode. all refrigerant during system repair and before final unit dis osal. 7. Slowly lower the cooling temperature until the first mer- cury bulb makes contact.The compressor, indoor blower, HEAT PUMP HEATING CYCLE and outdoor fan should now be running. Make sure cool Weighing In Charge air is supplied by the unit. As in the cooling mode the proper method of insuring that the 8. Turn system switch to "Heat' and fan switch to "Auto". system is properly charged is by weight with the additional charge adjustments for line size, line length, and other system 9• Slowly raise the heating temperature setting.After the heat- components as previously indicated. ing first-stage mercury bulb (upper) makes contact, stop moving the lever.The compressor, indoor blower and out- STARTUP PROCEDURE AND CHECK LIST door fan should now be running. After giving the unit time Begin with power turned off at all disconnects. to settle out, make sure heated air is being supplied by 1. Set first-stage thermostat heat anticipator to .12 (amps) the indoor unit. and turn thermostat system switch to"Cool'and fan switch 10. If the outdoor ambient is above 21.1°C, the compressor to "Auto". may trip on internal overload. 2. Turn cooling temperature setting as high as it will go. 11. In the event that the outdoor ambient is too high to allow a thorough heating cycle check, postpone the test until 3. Inspect all registers and set them to the normal open po- another day when conditions are more suitable...but - sition. DO NOT FAIL TO TEST. 4. Turn on the unit electrical supply at the fused disconnect 12. If unit operates properly on the heating cycle, raise the switch, both for the indoor unit and the outdoor unit. heating temperature setting high enough until the heat- 5. Turn the fan switch to the"On"position.The blower should ing second-stage mercury bulb (lower) makes contact. operate 10 to 15 seconds later. 8 Downloaded from www.Manualslib.com manuals search enginc