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.
DO NOT vent water heater with venting system serving another appli- ance.
DO NOT vent water heater to an outside enclosed porch area.
Protect building materials from flue gas exhaust.
Install water heater on an exterior wall, with access door opening to outdoors.
DO NOT 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 (cir- cuit board) has been disconnected.
DO NOT use battery charger to supply power to water heater even when testing.
USA AND CANADA - FOLLOW ALL APPLICABLE STATE AND LOCAL CODES - IN THE ABSENCE OF LOCAL CODES OR REGULATIONS, REFER TO CURRENT STANDARDS OF:
Recreation Vehicles ANSI A119.2/NFPA 501C.
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.
National Electrical Code ANSI/NFPA No. 70 and/or CSA C22.1
Park Trailers A119.5
CSA standard Z240 RV Series, Recreational Vehicle.
Below is the most common type of installation for the water heater. However, there are other approved methods such as baggage com- partment (refer to MPD 90093) and flush mounting installations (refer to MPD 93948). Consult your Field Auditor, Account Manager, or the Atwood Service Department if you have additional questions.
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).
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.
If water heater is installed where leakage of connections or tank will damage adjacent area, install a drain pan which can be drained to out side of coach, under water heater.
Connect both 1/2˝ NPT water lines - hot water outlet female (FIG 1-A) and cold water inlet female (FIG 1-B) and 3/8˝ flared LP gas lines (FIG 1-C).
Allow flexibility in water and gas lines so you can pull unit for- ward through wall one inch past skin (FIG 2.
Seal gas line entrance opening by sliding grommet (FIG 1-D) onto 3/8˝ tubing (FIG 1-F) before flaring tubing (FIG 1-F). Pull gas line and grommet through opening in housing (FIG 1-C). Connect flare fitting (FIG 1-E) 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.
Always use pipe lubricant on threads when connecting hot and cold water couplings. A suitable plastic fitting is recommended.
Do not lift, pull or push main burner tube (FIG 9-C).
Erect side walls and cut opening. See chart and FIG 2-A & B. Frame with 2x2 lumber (or equivalent).
CUT OUT DIMENSION
C 17-5/8˝ 20-5/8˝
MINIMUM CLEARANCE FROM COMBUSTIBLE CONSTRUCTION
Bend all flanges 90˚ along scored lines (FIG 3).
To prevent water leaks caulk thoroughly around opening, including bend slots (FIG 3-A). Butyl Tape (1˝x1/8˝) may be substituted for caulking material.
Push unit against caulking, secure 4-corner brackets FIG 4-A to coach with No.8 - 3/4˝ round head screws (not furnished) or equivalent. Complete the installation by inserting the same type of #8 screws in the holes provided around the flange of the water heater housing. Check all gaskets, they must adhere to the pan creating an air tight seal.
Attach access door (FIG 5).
Snap hinge pin (FIG 5-A) into clip (FIG 5-B).
Slide cover (FIG 5-C) onto hinge pin.
Slide hinge pin into cover, snapping into clip at same time (FIG 5-D).
NOTE: To remove hinge pin, support access cover and apply force to corner of hinge pin as shown FIG 5-E.
Disconnect unit and its individual shut-off valve from gas supply line during any pressure testing of system in excess of 1/2 PSIG
kPa, 14˝ water column [W.C.]). DO NOT set inlet pressure higher than maximum indicated on rating plate of gas valve (13˝ W.C.). Isolate unit from gas supply line by closing its individual manual shutoff valve during any pressure testing ≤ 1/2 psig.
FIRE AND/OR EXPLOSION
DO NOT use matches, candles or other sources of ignition when checking for gas leaks.
Turn on gas and check water heater and all connections for gas leaks with leak detecting solution.
Fill water heater tank, check all connections for water leaks (FIG 1- A & B).
PRESSURE-TEMPERATURE RELIEF VALVE - (FIG 10)
Valve is not serviceable, it must be replaced.
Tampering with valve will result in scalding injury.
Tampering with valve will void warranty.
DO NOT place a valve, plug or reducing coupling on outlet part of pressure temperature relief valve.
THIS VALVE IS A SAFETY COMPONENT AND MUST NOT BE REMOVED FOR ANY REASON OTHER THAN REPLACEMENT. This water heater is equipped with a tempera- ture and pressure relief valve that complies with standard for Relief Valves and Automatic Gas Shutoff Devices for Hot Water Systems, ANSI Z21.22. If you use a discharge line, do not use a reducing coupling or other restriction smaller than outlet of relief valve. Allow complete drainage of both valve and line.
FOR REPLACEMENT PARTS:
DO NOT install anything less than a combination temperature-pressure relief valve certified by a nationally recognized testing laboratory that maintains periodic inspection of product of listed equipment or materi- als, as meeting requirements for Relief Valves and Automatic Gas Shutoff Devices for Hot Water Supply Systems, ANSI Z21.22. Valve must have a maximum set pressure not to exceed 150 psi.
Install valve into opening provided and marked for this purpose on water heater.
Installation must conform with local codes or in the absence of local codes, American National Standard for Recreational Vehicles, ANSI A119.2/NFPA 50IC.