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Condensate Drain
Check the level of the heat exchanger; It must have a slight angle from the rear to ensure that the
condensate drains from the heat exchanger.
Condensate trap (from package) installed according installation manual?
Inside diameter of drain piping
Is there a definite air gap between the condensate trap and the connection to drain pipe?
Total drop in height from water heater to drain piping exit point
Any additional trap points?
Perform PH test and register PH value
Condensate neutralizer installed
Water circulation & temperature regulation (for DHW)
Piping diameter
Total length of straight pipe between water heater& tank
Number of elbows
Number of tees
Temperature rise between inlet and outlet after 5 min. cold-start operating max. power
Water temperature setpoint
Test of Water Flow Switch (DHW)?
Gas supply
Type of Gas from installation
Is gas isolation valve installed under water heater according to installation manual?
Which diameter gas isolation valve is installed?
Gas piping (inside) diameter
Gas piping material (if possible specify mark/type)
Gas piping flexible (YES/NO)
Gas piping inside structure (e.g. smooth/corrugated)
Measured Gas pressure @Gas valve (static) **
Measured Gas pressure @Gas valve (dynamic - all gas
appliances in the building must be turned on and running at full load)
Is there a secondary gas pressure regulator before the heater?
If YES what is the length of the Gas piping in between?
If YES what is the Brand & Model?
**Gas valve
Pressure Nipple
E93.1804.014
°C / °F
(YES / NO)
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