EPV SERIES CONDENSING WATER BOILER
34-501 07/13
6
SERVICE CLEARANCES
Allow sufficient space to provide adequate clearances on all sides for service and inspection. Recommended
clearance is 24” at the top and front, 18” at left and right sides of the appliance. Optional equipment may increase the
clearance requirements. Allow sufficient space for installing and servicing connections such as water, gas, vent,
combustion air, electrical, pump and other auxiliary equipment.
CLEARANCES TO COMBUSTIBLE SURFACES
The appliance must not be installed on a combustible floor, or on a non-combustible floor covering combustible
material. Clearance to unprotected combustible material must be 8” minimum at top, sides and rear, and 24”
minimum in front. Recommended access for service is 18” at sides and rear and 24” in front.
ELECTRICAL
WARNING: Turn off all electrical service to the appliance when accessing the controls located inside the
control cabinet. The cabinet contains high voltage wiring and terminals. If the electrical service is not
turned off and these wires or terminals are touched, a dangerous shock causing personal injury or loss of
life could occur. Close the control cabinet before restoring electrical service to the appliance.
1. Wiring to the unit should conform to the National Electrical Code or the code legally authorized in your
locality. A fused disconnect switch should be used for the boiler. When required, EPV boilers are
equipped with step-down transformers located within the NEMA enclosure. This allows for an effective
single point electrical connection to the boiler.
2. Be certain that high and low voltages are connected to the correct points.
3. When remote on/off or lead-lag enable operation is used, remove jumper from R1 and R2 and wire in
series.
4. A proper earth ground for this unit must be provided. A single conductor ground wire pulled from the
distribution panel to the sub panel (or some similar type) is recommended.
CAUTION: Use only copper wiring of proper sizing for incoming service. Damage resulting from use of
aluminum wiring will be excluded from coverage under the warranty of this unit.
CONDENSATE NEUTRALIZATION & DISPOSAL
The EPV boiler can produce significant amounts of condensate because of their high efficiency. Condensate
occurs naturally when water vapor in combustion gases is cooled below the dew point. Although only slightly
acidic, EPV boiler condensate can be routed through an optional neutralization system to become pH neutral
allowing for disposal into any drain or sewer system without concern for corrosion. A fitting should be provided in
the venting to route any vent condensate away from the combustion blower. This can be accomplished by
installing a tee in the vent not more than 18" from the combustion blower outlet.
Crushed limestone fills the condensate neutralization bath. Condensate slowly flows through the limestone bed
and is neutralized thus avoiding chemical treatment or dilution using substantial quantities of tap water. If the
condensate pH is lower than 4 when checked with a pH meter or pH paper, consult the factory for replacement
treatment system. Condensate drainage from the POWER VT
boiler will only occur after a recovery run cycle. If
no condensate is drained during this time, the drainpipe should be inspected for blockage. Should the heater not
be installed on a housekeeping pad to ensure gravity drainage, a means of removing condensate, such as a
pump, should be supplied in the system.