Amtrol whs-series warranty Startup Procedure, Troubleshooting, Warranty

Startup Procedure

1.PURGE HEAT EXCHANGER: The heat exchanger should be free of large air pockets to allow the circulator to operate properly. Using the diagram below as a guide, isolate the boiler return line and flush the loop until large air pockets are purged. After this, the air elimination equipment will collect smaller air bubbles.

2.FILL TANK: Open the hot water fixture furthest from the heater. Open the cold water supply and allow the water to run until air stops emerging. Air pockets may appear at any hot water fixture. This is considered normal and will clear as hot water is used.

3.START HEATER: Turn power on to the unit. Mechanical controls should have the knob rotated to the 120°F mark. The circulator or zone valve should operate and the boiler should start.

4.CHECK OPERATION: The water heater will begin to heat. Depending upon the size of the water heater, output of the boiler and the space heating load, the unit should typically reach set temperature within 15 to 60 minutes. If heating does not occur, consult the troubleshooting section in this manual. Note: Large heaters coupled with small boilers may exceed this time period upon initial startup.

5.SET TEMPERATURE: The control should be set to the minimum temperature consistent with the user’s needs. This maximizes efficiency and reduces scald potential.

Painful scalding with possible serious and permanent injury can occur if the temperature is set too high or the thermostat is not

functioning properly.

6.MAINTENANCE: The water heater and system should be periodically checked by a licensed professional at least annually and more often as system ages.

Troubleshooting

PROBLEM	POSSIBLE CAUSES		SOLUTION
	1.	No power to unit	1.	Check circuit breaker, boiler emergency switch and boiler reset switch.
	2.	Circulator air-bound	2.	Purge air. Ensure circulator is on Boiler Supply. Check air vents.
No hot water	3. Faulty circulator or zone valve		3.	Check circulator and zone valve. Repair or replace if necessary.
	4.	Faulty control	4.	Check continuity. Switching circuit should close. If not, replace control.
	5.	Boiler inoperable	5.	Check boiler system. Boiler must operate to generate hot water.
	1.	Demand exceeds capacity	1.	Check sizing based on household size and boiler output.
			2.	Increase temperature setpoint.
	2.	Temperature too low
			3.	Set up for priority. If problem persists add storage or increase tank size.
	3.	Boiler lacks output for simultaneous heat &
			4.	Check Boiler Supply/Boiler Return during cold startup. If difference is less
Insufficient hot water		hot water
				than 20°F, clean heat exchanger as outlined below. Install water treatment
	4.	Fouled heat exchanger
				equipment to prevent recurrence.
			5.	Check for undersized or faulty circulator, stuck or undersized zone valve.
	5.	Insufficient heat exchanger flow		Ensure all shutoff valves are open. Check for stuck flow check valve.
				Purge boiler loop to remove air.
	1.	Improper plumbing	1.	If Boiler Return is plumbed to the suction-side of a heating circulator,
				overheating will occur when the home’s heat is on. Fix plumbing.
Water too hot	2.	Temperature set too high	2.	Reduce temperature setting.
	3.	Temperature sensor bulb not fully inserted	3.	Re-insert temperature sensor bulb.
	4.	Stuck zone valve	4.	Repair or replace.
	5.	Flow check valve stuck open	5.	Clean, repair or replace.
	1.	Thermal expansion tank undersized or missing	1.	Install the properly sized thermal expansion tank.
Relief valve dripping	2.	Thermal expansion tank set improperly	2.	Ensure precharge air pressure matches static water pressure.
	3.	City pressure too high	3.	Install a Pressure Reducing Valve (PRV) if city pressure is over 80psi.
or opening
	4.	System over temperature	4.	Determine cause of over temperature condition and correct problem.
	5.	Faulty relief valve	5.	Replace relief valve.
Discolored water	1. Poor water quality		1.	Have water tested for contaminants.
at faucet	2. Sediment or suspended particles		2.	Install sediment filter, purge unit more often to avoid future problems.
Boiler will not operate	1. Improper or loose wiring		1.	Check connections against wiring diagrams in this manual.
when calling for	2. Boiler high limit has been reached		2.	Boiler will periodically cycle on and off during operation.
hot water	3.	Problem with boiler system	3.	Have boiler diagnosed for proper operation.

Warranty

WHS Series and DC Series:

10 Year Limited Warranty Residential

5 Year Limited Warranty Commercial

Visit www.amtrol.com for complete warranty details.