Cold In
Gas Connection
Hot Out
GENERAL INSTALLATION
The following instruction describes the most common type of
installation for the water heater. The most common mounting
location would be in the “basement” or luggage compartment.
Consult your Field Auditor, Account Manager, or the
PrecisionTemp Service Department if you have additional
questions.
Mounting Unit
Unit should be located to allow hookups on the back and
access to the front panel for servicing. Note the locations
of the flue pipe, combustion air cut-outs and mounting
holes on the diagram below. The dotted line represents
the base of the unit. Be sure these holes will not interfere
with any framing members or other wiring or equipment
under the coach. When the appliance is installed directly
on carpeting, it shall be installed on a metal or wood panel
extending beyond the full width and depth of the appliance
by at least 3 inches (76.2 mm) in any direction.
The
appliance should be located in an area where leakage of
the unit or connections will not result in damage to the
area adjacent to the appliance or to lower floors of the
structure. When such locations cannot be avoided, it is
recommended that a suitable drain pan, adequately
drained, be installed under the appliance. The pan must
not restrict combustion air flow.
Be sure to observe proper clearances around the unit.
1. Referring to the diagram, locate the proper mounting
location and cut a hole with a diameter of 4.25” to
accommodate the flue pipe with at least 1” clearance
completely around the flue pipe. A 4.5” hole for the
combustion air should be cut so that it is under the bottom
air intake grill. This hole must be located where it cannot
be covered or blocked and to assure all combustion air
comes from the outside.
2.
Mount the 2 brackets to the bottom of the unit on
either side using the supplied 1/4” bolts.
3.
Place unit into place to locate 4 mounting holes and
mark their positions.
4.
Remove the unit and drill the 4 – 3/8” mounting holes
in the floor.
5.
Apply a rubber gasket or sealant around the
combustion air hole on the bottom of the unit and
mount unit in place assuring the seal is in complete
contact with the mounting surface to assure an air
tight seal. Note: Do not use glue.
6.
Screw or bolt into place.
Exhaust Pipe Installation
After the unit is secured into place, the exhaust pipe is
installed as follows:
1. Fit the long pipe / elbow onto the 2” flue tailpiece from
the bottom of the unit and push flare side of the elbow
up onto the flue tailpiece of the unit.
2. Locate the pipe out from under the coach while
positioning it so that it points about 30° to the rear of
the coach. Allow for at least 6” to protrude from under
the coach.
3. Now remove the pipe and coat the inside diameter of
the flue pipe elbow with high temperature silicone
sealant or equivalent.
4. Locate pipe onto tailpiece and screw the elbow of the
pipe to the tailpiece. This can be done with self-
tapping screws or by pre-drilling the hole before
inserting metal screws. At least two screws must be
used to secure the pipe.
5. Screw or clamp assembly into place and use a proper
exhaust bracket to support flue pipe to the bottom of
the coach.
7.
Connect plumbing to water lines taking care to make
correct “COLD” and “HOT” orientation. Connect 3/8” FM
flared LP gas line to 3/8” M flared gas fitting. Assure the
water and gas line grommets continue to be intact and
properly inserted in the case holes, with no gaps or
openings where the lines pass through the case. See
illustration.
8. Turn on the gas and check the water heater and all
connections for gas leaks with a leak detecting solution.
9. Turn on water supply line and check for water leaks.
All connections must be made using TWO
(2) wrenches to avoid twisting and damaging
lines. Damage voids the Warranty!
2
4.5”
Flue Pipe Opening
4.25”
Combustion Air
Opening
4.5” Minimum
Gasket or Sealant between unit
base and mounting surface
3/8” mounting hole X 4
Front access door-
do not block
Back - Allow enough clearance for hookups
9.0”
10.1”
6.25”
11.0”
13.5”
13.5”
Mounting Bracket X 2
9.5”
5.56
3.5”
1.5” HOLE
1.625”
2.875”
