
10
AIR CONDITIONING / HEAT PUMP
BOILER & WATE R HEATERS & HIGH EFFICIENCY MODULATING HOT WATE R SYSTEMS
FURNACES: 80% FURNACES: 90%
Suction Line:
• Temperature
Verify proper:
•
Static Duct Pressures
• Temperature Differential
• Static Pressure Drop Across Coils
BO
I
LER
Verify proper combustion:
• O2
• CO Air Free
• Stack Temp
• Stack Draft
• SSE
WATE R HEATER
Draft
Verify proper combustion:
• O2
• CO
• Stack Temp
• Efficiency
HE BO
ILER
IN
STANT
WATE R HEATERS
Draft
Verify proper
combustion:
• O2
• CO
• Stack Temp
• Efficiency
Hi / Low fire Gas
Pressure
Send and Return
Water temp
8
0% F
U
R
NACE
Verify proper combustion:
• O2
• CO
• Stack Temp
• Vent Pressure
• Efficiency
V
erify/Set Up
• Gas Pressure
T
est
• Limit Switch
• Pressure Switch
Verify proper operation:
• Static Duct Pressur
e
• T
emperature Rise
• AC side Static Pressure
Dr
op acr
oss coils
9
0%+ F
U
R
NACE
Verify proper combustion:
• O2
• CO
• Stack Temp
• Vent Pressure
• Efficiency
V
erify/Set Up
• Gas Pressure
T
est
• Limit Switch
• Pressure Switch
Verify proper operation:
• Static Duct Pressur
e
• T
emperature Rise
• AC side Static Pressure
Dr
op acr
oss coils
WHERE TO TEST
to condensing unit
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