| Type: |
Gas instantaneous, direct vent water heater designed for
recreational vehicle and mobile home use. Full gas modulation
temperature control. |
| Dimensions: |
13.5" Wide x 13.5" Deep x 14.5" High. Weight: 27.5 pounds. |
| Rough-in dimensions: |
Add 1/4" to above dimensions. For retrofit, see special
directions. |
| Clearances: |
Zero clearance top, bottom and sides. 2" in back for
hook-ups |
| Construction: |
Modular, three assemblies; gas, electronics and water. |
| Burner: |
High primary air, 12 element, atmospheric type. Aluminized steel
body with stainless flame strips |
| Heat exchanger: |
Copper fin tube type with wrap for cooling. |
| Electronics: |
Plug in, works-in-a-drawer. |
| Case and flue assembly : |
Galvanized with painted aluminum access door (polar white or
colonial white; surface or flush mount). |
| Mounting: |
One inch mounting flanges with corner pieces and door jamb
included. Must be mounted in accordance with local codes or in
absence of local codes, Manufactured Home Standard, Title 24 CFR,
Part 3280 or Recreational Vehicle Standard, ANSI A
119.2/NFPA501C |
| Hook-ups: |
Electric: 18-2 x 2' lead.
Gas: brass 3/8" flare inside case rear or side
accessible.
Water: 1/2" OD copper tubing. Brass compression to
1/2" NPT elbow can be installed or as specified.
|
| Fuel: |
Propane at 11 WCI |
| Capacity: |
53,000 Btu input - 42,500 Btu output at maximum burn at 8.5 WCI
manifold pressure.15,000 Btu input - 9,600 Btu output at low burn at
1.2 WCI manifold pressure.
(85°F temperature rise per gallon per minute
continuous flow at high burn). |
| Fuel consumption: |
2.55 lbs per hour at maximum input. ( At 2 GPM of water, 20 lbs
of propane will produce over 940 gallons of hot water). |
| Power: |
12 VDC at 1 amp. Operating range is 9 to 15 VDC. |
| Flue gas temperatures: |
Under 300°F. |
| Water temperature: |
Factory set at 115° F. Can be field adjusted 90° to 135°F. |
| Leakproofing: |
Case is sealed from interior of coach. Bottom is sloped to
channel water out of unit. Hook-up plumbing is gasketed. |
|
Gas train: |
Burner is a 12 element high primary air, atmospheric type with
stainless steel flame strips. Aluminum manifold with brass pressure
tap. Orifices, brass # 71 x 12. |
| Modulating valve: |
Solid brass conduit with 3/8" NPT ends. Control is non-intrusive
into gas cavity using no seals, pushrods or diaphragms. There is a
5:1 gas flow ratio con-trolled by a magnetic field actuating
movement of a poppet in and out of a fixed orifice. |
| Gas Valve: |
Redundant solenoid with integral two stage regulator and 1/8"
NPT pressure tap. |
| Water Assembly: |
Heat exchanger: Solid copper, fin tube type, 6 fins per inch
with copper combustion chamber with 1/2 " tube wrap to cool
assembly.
Hook-ups: 1/2" OD copper tubes.
Flow meter: Plastic rotary type with encapsulated
magnetic rotor and Hall plate.
Clear plastic observation port.
Pressure relief valve: Approved, set @ 100PSI.
All other hardware in contact with water is brass or
NSF approved composites. |
| Controls: |
Microprocessor, controlling ignition, flame proofing, safety
systems and electronic gas modulation temperature control. Control
boards are mounted in a removable drawer, coated, with plug-in
connectors protected with an anti-oxidant compound. |
| Ignition: |
Direct spark type with two 2.5 second ignition attempts. |
| Flame proofing: |
Rectification, shutting gas valve off in .8 of a second if
proofing fails. Ignition and proofing is effected by a single
stainless probe at the burner. |
| Temperature sensors: |
Three thermistors, one senses incoming water temperature
(mounted on cold water line of heat exchanger), one senses
temperature midway through heat exchanger (mounted in stainless
probe with compression fitting on the heat exchanger), and one
senses outlet temperature, (mounted to hot water outlet on the heat
exchanger). |
| Flow meter. |
Senses rate of water flow, (mounted on inlet water pipe). |
| Temperature control: |
Maintained by microprocessor controlled gas modulation that
de-livers output water temperature within ±2°F by sensing water flow
rate and three tem-perature inputs. |
| Safety Features: |
The Model RV 500 is pilotless. There is no flame unless water
flow is sensed.
Flame rectification: Gas valve shuts off in .8 of a
second if there is a flame outage.
Redundant gas solenoid.
Electronic high temperature shut-off (two).
ECO high temperature shut off @ 165°F with manual
reset.
Pressure relief valve at 100 PSI.
Direct vent with combustion chamber sealed from inside
of coach. |
| Model RV-500 |
Operation: When unit is powered, the microprocessor activates
the gas modulation valve and per-forms component diagnostics. A
green LED will flash for normal operation, red will indi-cate a
malfunction, signified by different codes. The unit will remain
dormant until the rotary flow meter senses at least .4 GPM of water
flow. The gas modulating valve will be set to its ignition value,
the spark will be effected and the gas valve will open. Igni-tion
will occur and the flame will be proofed.
The microprocessor now reads water flow rate, and
incoming water temperature, calcu-lates the required gas flow to
maintain set temperature and sets the gas modulation valve to the
proper setting. The water temperature is then monitored by the
thermistors midway and at the outlet to make any minor corrections
in gas flow. If there is any change in water flow or incoming water
temperature, the microprocessor recalculates and makes any required
adjustments.
The unit continues to produce hot water until water
flow is stopped and the burner turns off. |
| Approvals: |
Approved to test standard: ANSI Z21.10.3
1993 |