Critical Installation Warnings; General Installation - Dometic MPD 93755 Mode D'emploi

CRITICAL INSTALLATION WARNINGS

Install in recreation vehicles only. RV's are recreation vehicles
designed as temporary living quarters for recreation, camping, or
travel use having their own power or towed by another vehicle.
All combustion air must be supplied from outside the RV, and all
products of combustion must be vented to outside the RV.
vent water heater with venting system serving another
DO NOT
appliance.
vent water heater to an outside enclosed porch area.
DO NOT
Protect building materials from flue gas exhaust.
Install water heater on an exterior wall, with access door opening to
outdoors.
modify water heater in any way.
DO NOT
alter water heater for a positive grounding system.
DO NOT
HI-POT water heater unless electronic ignition system
DO NOT
(circuit board) has been disconnected (DC Hi-Pot).
use battery charger to supply power to water heater even
DO NOT
when testing.
-
USA AND CANADA FOLLOW ALL APPLICABLE STATE AND LOCAL CODES
IN THE ABSENCE OF LOCAL CODES OR REGULATIONS
Recreation Vehicles ANSI/NFPA 1192.
National Fuel Gas Code ANSI Z223.1 and/or CAN/CGA B149 Installation
Codes
Federal Mobile Home Construction & Safety Standard, Title 24 CFR, part
3280, or when this Standard is not applicable, the Standard for Manufactured
Home Installations (Manufactured Home Sites, Communities and Set-Ups),
ANSI A255.1 and/or CAN/CSA-Z240 MH Series, Mobile Homes. Complies
with ANSI Z21.10.1/CSA 4.1 – latest edition.
National Electrical Code ANSI/NFPA No. 70 and/or CSA C22.1
Park Trailers A119.5
CSA standard Z240 RV Series, Recreational Vehicle.

GENERAL INSTALLATION

This is a common installation for water heaters. There are other
approved methods such as Baggage Compartment (MPD 90093) and
Flush Mount (MPD 93948) installations. Consult with your Field
Auditor, Account Manager, or the Dometic Service Department if you
have additional questions.
1. Locate water heater on floor of coach before erecting side walls.
The water heater tank must be permanently supported at the same
level as the bottom of sidewall cutout (by the floor or a raised floor)
2. Provide adequate clearance at rear of unit for service of water
FIG
connections.
2. To install water heater on carpeting, you must install appliance on a
metal or wood panel that extends at least three inches beyond the
full width and depth of appliance.
3. If the appliance is installed where connection or tank leakage will
damage adjacent area, install a drain pan (which can be drained to
out side of coach) under water heater.
WIRING
All wiring must comply with applicable electrical codes.
COMBINATION GAS/ELECTRIC MODELS are designed to operate with gas,
electricity, or a combination of both.
Use electrical metallic tubing, flexible metal conduit, metal clad
cable, or nonmetallic-sheathed cable with grounding conductor. Wire
must have a capacity of 1400 watts or greater. The wiring method
must conform to applicable sections of article 551 of National
Electrical Code ANSI/NFPA 70.
1. Refer to Wiring Diagram (
FIG
connections from junction box on back of unit.
a. Connect hot lead to (1) Black.
b. Connect common lead to (2) White.
c. Connect ground wire from electrical service to (3) green ground
lead in junction box 3.
PRODUCT DAMAGE
When using Romex with a bare earth ground, take care to position
®
ground wire so it does not contact the heating element terminals.
-
,
REFER TO CURRENT STANDARDS OF
12). Make 120 VAC electrical
CAUTION
When a cord and plug connection to the power supply are used on
water heater, power cord must be UL listed as suitable for damp
locations, hard or extra hard usage. It must be a flexible cord such
as type S, SO, ST, STO, SJ, SJT, SJTO, HS or HSO cord as described
in National Electrical Code, ANSI/NFPA 70. The length of external
cord to water heater, measured to face of attachment plug, shall be
no less than 2 feet nor more than 6 feet. Supply cord must be a
minimum of 14 AWG and attachment plug must be rated at 15 amps.
ELECTRICAL DAMAGE
Label all wires before disconnecting when servicing controls.
Verify proper operation after servicing.
ELECTRONIC IGNITION
: It is recommended unit be connected directly to a 12V DC
NOTE
battery or to filtered side of an AC/DC converter. Avoid connections to
unfiltered side of an AC/DC converter whenever possible. Use a
minimum of 18 gauge wire, UL and CSA listed.
1. Refer to Wiring Diagram (
convenient location. Position wall plate with letters up. Before
:
making connections turn switch OFF.
2. Install wires see
FIG
PILOT RELIGHT - 12
FIG
1. Install unit according to GENERAL INSTALLATION instructions.
2. Refer to Wiring Diagram. Use 18 gauge wire, UL/CSA listed.
3. Read PILOT & PILOT RELIGHT OPERATIONS.
HEAT EXCHANGE MODELS -
1. Push a 5/8˝ diameter coolant system hose (5-A) [with SAE 053 A
Type "E"clamp attached] onto heat exchanger tube (5-B) making a
tight connection.
2. Spread hose clamp and slide toward heat exchange unit past
annular groove (5-C) and release.
3. Continue to HOW TO OPERATE YOUR WATER HEATER and/or Electronic
Ignition OPERATION.
CONTINUE GENERAL INSTALLATION
4. Connect both 1/2˝ NPT water lines (
and cold water inlet female and 3/8˝ flared LP gas line to the water
heater ( 9).
FIG
a. Allow flexibility in water and gas lines so you can pull unit
forward through wall one inch past skin.
b. Seal gas line entrance opening (
onto 3/8˝ tubing (9-D) before flaring tubing (9-E). Pull gas line and
grommet through opening in housing (9-A). Connect flare fitting
(9-C) and press grommet into opening. If gas line tubing is
already flared, cut grommet on one side. Place split grommet
over gas line and press it into opening.
c. Always use pipe lubricant on threads when connecting hot and
cold water couplings. A suitable plastic fitting is recommended.
PRODUCT DAMAGE
Do not lift, pull, push or misalign main burner tube (
5. Erect side walls and cut opening. See chart and
Frame with 2x2 lumber (or equivalent).
CUTOUT
(FIG 1 & 2)
CAPACITY
Gallon 1-A
4 - 6 12-5/8˝
10 15-3/4˝
MINIMUM CLEARANCE FROM COMBUSTIBLE CONSTRUCTION
Sides:
Back:
6. Bend all flanges 90˚ along scored lines (
7. To prevent water leaks caulk thoroughly around opening, including
bend slots. Butyl Tape (1-1/3˝x1/8˝) may be substituted for caulking
material.
2
CAUTION
12). Install remote switch in a
FIG
10 & 11.
5
FIG
2) hot water outlet female
FIG
9) by sliding grommet (9-B)
FIG
CAUTION
FIG
CUT OUT DIMENSION
1-B
16-1/4˝
16-1/4˝
0˝ Top:
0˝ Bottom:
3-A).
FIG
3-F).
FIG
1.
DEPTH
2-C
17-5/8˝
20-5/8˝
0˝
0˝