HTP Munchkin High Efficiency Heater - Manual (Page 4)

1-B. LOCATION
The Munchkin is designed for Installation on combustible flooring, in alcoves, basements, closets, utility rooms. The
Munchkin shall be installed so that the gas ignition system components are protected from water. This includes all related
piping and components.
Choose a location for your Munchkin, centralized to the piping system, along with consideration to vent pipe length. The
length of vent pipe increases the firing rate of the Munchkin decreases. You must also locate the Munchkin where it will not
be exposed to freezing temperatures. Additionally, you will need to place the heater so that the controls, inlet/outlet, and gas
valve are easily accessed. This Munchkin must not be installed outdoors, for it is certified as an indoor appliance only and
must be kept vertical and on a level surface. Also, care must be exercised when choosing the location of this appliance; where
leakage from the relief valve and from related piping will not result in damage to the surrounding areas or to the lower floors
of the building. A heater should always be located in an area with a floor drain or installed in a suitable drain pan.
Proper clearance must be provided around the Munchkin as follows: Sides, bottom, top, and back are 0" (zero clearance).
Venting is also zero clearance. The front of the appliance needs 24" of clearance for service minimum. It must have a non-
rated or combustible door or access panel and should have a minumum clearance of 24" front, 15" top, 6" right side and 10" to
the left side. Under no circumstances, shall Heat Transfer Products Inc. be held liable for any such water damage
whatsoever. This heater must not be located near flammable liquids such as gasoline, adhesives, solvents, paint
thinners, butane, liquefied propane, etc., the controls of this appliance could ignite those vapors, causing an explosion.
1-C. PRESSURE RELIEF VALVE
A pressure relief valve is installed into the front right side manifold we recommend a WATTS "M 335 MI valve or
equivalent and meets the requirements of ANSI/ASME Section IV for heating boilers. A " pipe must be directed to a floor
drain or suitable location within 6" of drain or floor. Protect from freezing, do not plug or cap pressure relief valve. Serious
explosion causing property damage and or loss of life could result. Under no circumstances should the relief valve be
eliminated, capped or plugged.
PART 2
2-A. ELECTRICAL CONNECTION
The electrical connection for the Munchkin is on the left side of the unit. There is a ‰" knockout location for electrical
connection. All electrical wiring must be performed by a qualified licensed electrician in accordance with National Electrical
Code, or to the applicable local codes and standards. For your convenience we have labeled all the wire which needs to be
connected to operate the Munchkin. Caution: Do not remove labels on wires prior to disconnection. The electrical
requirements are for standard 120 volts, 60 Hz 10 amp service. This unit must be wired with #14 awg and fused for no more
than 15 amps. It is of extreme importance that this unit be properly grounded. There are two ground points in the
electrical compartment that must be connected to the building ground system. Connect the building to the green ground screw
and the green ground wire. It is very important that the building system ground is inspected by a qualified electrician
prior to making this connection.
The black wire is the hot lead and white wire is the neutral lead. Once all connections have been made the electrical
access may be closed. It is very important that the electrical power is not turned on at this time! A green LED is
provided on the main control board. This LED must be illuminated when the Munchkin is turned on for proper
operation.
WARNING:
THE MUNCHKIN MUST BE SET ON A LEVEL SURFACE SO
CONDENSATION DOES NOT BACK UP INSIDE BOILER!
SERVICING - WARNING - CAUTION
Before servicing let the munchkin cool down! Shut off electrical and gas supply.
Failure to follow warning could result in severe burn, electrical shock, gas
leakage, fire or explosion.
2