York ZJ078 User Manual

1183875-YIM-A-1014
Johnson Controls Unitary Products 73
1034349-UCL-B-0814
Unitary Products Group 5
OPERATING MEASUREMENTS - COOLING
REFRIGERANT SAFETIES
OPERATING MEASUREMENTS - GAS HEATING
Fuel Type:  Natural Gas  LP Gas
Stage
Discharge
Pressure
Discharge
Temp.
Liquid Line
Temp.
1
1. Liquid temperature should be taken before filter/drier.
Subcooling
2
2. Subtract 10 psi from discharge pressure for estimated liquid line pressure
Suction
Pressure
Suction
Temp.
Superheat
First # ° ° ° # ° °
Second (if equipped) # ° ° ° # ° °
Third (if equipped) # ° ° ° # ° °
Fourth (if equipped) # ° ° ° # ° °
Reheat 1st Stage # ° ° ° # ° °
Outside air temperature ________________ °F db ________________ °F wb ________________ %RH
Return Air Temperature ________________ °F db ________________ °F wb ________________ %RH
Mixed Air Temperature ________________ °F db ________________ °F wb ________________ %RH
Supply Air Temperature ________________ °F db ________________ °F wb ________________ %RH
Action Completed See Notes
Prove Compressor Rotation (3 phase only) by gauge pressure

Prove High Pressure Safety, All Systems

Prove Low Pressure Safety, All Systems

Action Completed See Notes
Check for gas leaks

Prove Ventor Motor Operation

Prove Primary Safety Operation

Prove Auxiliary Safety Operation

Prove Rollout Switch Operation

Prove Smoke Detector Operation

Manifold Pressure
Stage 1 IWC

Stage 2 (If Equipped) IWC 
Stage 3 (If Equipped) IWC 
Supply gas pressure at full fire IWC 
Check temperature rise
1
1. Input X Eff. (BTU output)
1.08 X Temp. Rise
 measured at full fire °F


York ZJ078 Specifications

General

Brand	York
Model	ZJ078
Category	Air Conditioner
Language	English