Lochinvar RPV-I&S - Manual (Page 9)

9
RPV-I&S
GAS CONNECTIONS
The gas supply lines must meet all requirements of the National Fuel Gas Code
ANSI Z223.1-(Latest Edition) and/or in Canada CAN/CGA B149 Installation
Codes - (Latest Editions).
The minimum permissible gas supply pressure for the purpose of input
adjustment is 1.5" water column (.37 kPa) above the operating manifold
pressure for natural gas and 1.0" (0.25 kPa) water column for L.P. gas. See the
rating plate and combination gas control for the manifold pressure and gas
type.The maximum permissible gas supply pressure is 14.0" water column (3.5
kPa) for natural gas and liquefied petroleum gases/propane gas.
1. Connect this water heater only to the type of gas (Natural or Propane
gas) as shown on the rating plate. Use clean 1/2 inch black iron pipe.
(Dirt and scale from the pipe can enter the combination control and
cause it to malfunction). The inlet gas line must have a minimum length
of 3" (7.6 cm) drip leg (sediment trap) installed as close to the water
heater’s combination gas control as possible. A ground joint union must
be installed in the gas supply line feeding the water heater to permit
servicing of the water heater. Compounds used on the threaded joints of
the gas piping must be resistant to the action of liquefied petroleum
gases/propane gas.
2. This water heater and its gas connection must be leak tested before
placing the water heater in operation. Check for gas leaks with a soap
and water solution and a brush or a commercial leak detector fluid.
NEVER USE A MATCH OR OPEN FLAME FOR TESTING!
3. While checking for leaks care must be taken to prevent solution from
contacting the electrical connections at the control. If electrical connections
at the control become wet, they must be thoroughly dried before
attempting to operate the water heater.
ELECTRICAL CONNECTIONS
All electrical wiring and connections must be in accordance with the National
Electric Code ANSI/NFPA No. 70 (latest edition), or the Canadian Electrical
Code C22.1 (latest edition) and any local codes which may apply. The water
heater must be electrically grounded.
If a flexible line cord and plug is permitted by local code, then provide a (3)
three wire grounding type receptacle within 6 feet (1.9 m) of the water heater
and use the flexible cord provided. Do not plug the line cord into a receptacle
that can have its power supply interrupted by a switch that is used to turn on
and off lights.
If wiring in conduit is required, remove the flexible line cord from the jacket and
install a 1/2" electrical conduit connector and connect 110/120 volt power
source. Connect the hot, neutral, and ground leads of the electrical supply to
the corresponding locations that were connected to the flexible line cord.
The wiring diagram for the 48 gal, 65,000 BTU (181.7 L, 19.1 Kw/Hr), 65 gal,
65,000 BTU (246.1 L, 19.1 Kw/Hr) and 75 gal, 76,000 BTU input (283.9 L, 22.3
Kw/Hr) models is located in (Figure 11) on page 10. The wiring diagram for the
40 gal, 40,000 BTU (151.4 L, 11.7 Kw/Hr) and 48 gal, 40,000 BTU (181.7 L,
11.7 Kw/Hr) models are located in Figure 12 on page 11. Refer to the rating
plate located on the water heater for correct model identification.
GENERAL OPERATION
TO FILL THE WATER HEATER
1. Close the water heater drain valve by turning the stem clockwise.
2. Open the cold water supply shut-off valve.
3. Open several hot water faucets to allow air to escape from the system.
4. When a steady stream of water flows from the faucets, the water heater is
filled. Close the faucets and check for water leaks at the water heater drain
valve, combination temperature and pressure relief valve and the hot and
cold water connections.
TO DRAIN THE WATER HEATER
Should it become necessary to completely drain the water heater, make sure
you follow the steps below:
1. Shut off the gas supply to the water heater.
2. Turn off/disconnect all electric power to the water heater.
3. Close the cold water supply shut-off valve.
4. Open the drain valve on the water heater by turning the stem
counter-clockwise. The drain valve has threads on the end that will allow the
connection of a standard hose coupling.
5. Open a hot water faucet to allow air to enter the system.
To refill the water heater, refer to “To Fill the Water Heater.”
CAUTION
The water heater and individual shutoff valve must be disconnected from the gas
supply piping system during any pressure testing of the system at test pressures in
excess of ½ psi (3.5kPa). The water heater must be isolated from the gas supply
piping system by closing its manual shutoff valve during any pressure testing of
the gas supply system at test pressures equal to or les than ½ psi (3.5kPa). The
supply line must be capped when not connected to the water heater.
CAUTION
Turn off or disconnect the electrical power supply to the water heater
before servicing. Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and dangerous operation.
Verify proper operation after servicing.
WARNING
Water heaters are heat producing appliances. To avoid damage or injury there must
be no materials stored against the water heater or vent-air intake system and proper
care must be taken to avoid unnecessary contact (especially by children) with the
water heater and vent-air intake components.
UNDER NO CIRCUMSTANCES
SHALL FLAMMABLE MATERIALS, SUCH AS GASOLINE OR PAINT
THINNER BE USED OR STORED IN THE VICINITY OF THIS WATER HEATER,
VENT-AIR INTAKE SYSTEM OR IN ANY LOCATION FROM WHICH FUMES
COULD REACH THE WATER HEATER OR VENT-AIR INTAKE SYSTEM.