ERGOMAX TROUBLE-SHOOTING CHECK LIST

PROBLEM  

PROBABLE CAUSE  

SOLUTION

No hot water   Boiler does not operate   - Press reset button
- Check fuse
- Check main cut off switch
Circulator does not operate - Check power supply
Zone valve does not open - Check power supply
Improper setting on aquastat - Turn aquastat to a higher temperature
Electrical problem - Check relay, fuse and replace
- Reset circuit breaker (if applicable)
- Check power supply
- Check all wiring

Inoperative aquastat - Set aquastat to higher temperature and see if circulator starts to operate. Replace aquastat if needed
Air trapped in ERGOMAX tank - Open pressure relief valve on top of ERGOMAX to let air out
Not enough hot water Aquastat set too low - Turn aquastat to a high setting & install mix valve
Demand greater than boiler output - Check sizing calculation
Defective aquastat - Replace

Insufficient boiler output (BTU's) with no priority for domestic hot water

- Reduce hot water flow rate. Install priority switch. Install mix valve
Air trapped in ERGOMAX tank - Open pressure relief valve on top of ERGOMAX to let air out

Water temperature starts to drop Aquastat set too low - Set aquastat to higher temperature
Boiler undersized, no priority for DHW - Install priority switch
Demand for hot water greater than boiler Btu output - Reduce hot water flow & check boiler/ERGOMAX sizing calculations
Water pressure is very high Install pressure reducing valve. Set to 60-65 psi
Water temperature too hot Aquastat set too high - Set aquastat to lower temperature
- Check aquastat operation. (As aquastat is set to lower temperature, circulator should stop.)
Defective aquastat - Replace aquastat
Check mix valve - Set mix valve to lower temperature
- Clean mix valve
Improper plumbing - Check plumbing against installation instructions
Improper system wiring - Check wiring
Sound of rushing water when circulator starts Air in piping and/or tank - Open pressure relief valve to let air out. Install air vent on last elbow in piping leading into the tank
Gurgling sounds in ERGOMAX Air in tank - Open pressure relief valve to let air out. Install air vent on last elbow in piping leading into the tank
Coils making a noise Air in tank - Open pressure relief valve to let air out
Surges of hot/cold water in shower Shower fixture problem - Check pressure balancing valve operation
Pressure relief valve discharges occasionally Pressure on boiler side too high - Lower boiler pressure
- Check pressure relief valve operation
- Check if expansion tank has failed
Pressure relief valve discharges often Pressure on boiler side too high - Could indicate coil failure. Call your plumber
Boiler cycles too often Boiler high limit set too low - Set high limit higher
Electrical wiring - Check aquastat/boiler control wiring
Boiler control - Check boiler control operation
Aquastat - Check aquastat operation
Tank leak Determine location - Check tank drain for leak

- Call your plumber to determine location (aquastat well not tight, pressure relief valve leaking, temp/pressure gauge not tight, tank leak)

 

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ERGOMAX Improvements & Buffer Tanks

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