Natco Fire-Coil Volume Water Heaters
Page 15
SECTION 3.
Operating Instructions
3A. Normal Operating Sequence
NOTE: Safe lighting and other performance
criteria were met with the gas manifold and control
assembly installed on the heater during tests specified
in ANSI Z21.13.
WARNINGS
Vent pipes, drafthoods, and heater tops get hot!
These surfaces can cause serious burns. Do not
touch these surfaces while the heater is in
operation. Adding a vent cap reduces the
temperature on the top.
For your safety, when starting the heater, keep your
head and face well away from the lower firebox
opening to prevent any risk of personal injury.
LP GAS: To avoid possible injury, fire and
explosion, read and follow these precautions and all
instructions on this heater before lighting. This
heater uses LP gas which is heavier than air and will
remain at ground level if there is a leak. Before
lighting, sniff at ground level.
If you smell gas, follow these rules:
1. DO NOT light matches. DO NOT turn electric
lights or switches on or off in area. DO NOT use
an electric fan to remove the gas from area.
2. Shut off gas at LP tank.
3. Telephone gas company and fire department for
instructions. Give your name, address and
phone number.
If your LP tank runs out of fuel, turn off gas at the
heater. After the tank is refilled, the heater must be
relit in accordance with the instructions found on the
inside of the heater. DO NOT attempt repairs on the
gas control or heater. Tampering is dangerous and
voids all warranties.
3B. Start-Up Procedure
Lighting instructions can be found on the inside
of the heater. To start up the heater:
1.
Make sure the system pump is running and there
is water flow.
2.
Remove the control access panel.
3.
Set the temperature control (see Figure 27) to its
lowest setting.
4.
Turn electric power to the appliance to off.
5.
Turn manual gas valve off.
6.
Wait 5 minutes to clear out any gas, then smell
for gas, including near the floor. Be sure to smell
next to the floor because some types of gas are
heavier than air and will settle on the floor.
Caution
This heater is equipped with an ignition device which
automatically lights the burner. Do not try to light the
burner by hand.
7.
Turn manual gas valve on.
8.
Reset all safety devices (some units have manual
resets on hi-limit switch, low water cutoff, etc.).
9.
Replace control access panel.
10.
Turn electric power to the heater on.
11.
Set temperature control to desired setting.
12.
If the heater will not operate:
a. Turn gas to heater off following the
instructions found on the inside of the heater
and call a qualified service technician or gas
supplier.
b. Turn main electrical switch off.
c. Close all manual gas valves.
3C. Setting the Temperature Controls
The hi-limit switch is factory set and should not
be adjusted.
WARNING
Adjusting the temperature control past the
recommended setting can result in a scalding injury.
Hot water can produce third degree burns in 6
seconds at 140°F (60°C) and in 30 seconds at
130°F (54°C).
Water temperature can be adjusted at the
temperature control (see Figure 27). The temperature
control is adjusted to its lowest setting when it is
shipped from the factory. The 130°F (54°C) setting is
the recommended starting point for setting the
temperature control.
The recommended setting will result in
satisfactory energy savings. Lowering the temperature
may result in reduced energy costs. Connecting the
heater to a separate storage vessel and lowering the
temperature setting, may reduce energy losses during
standby periods when hot water is not being used, and
may meet normal hot water needs. For increased hot
water usage, a higher temperature setting may be
necessary to meet increased demand. Reset the
temperature setting to a lower level after periods of
increased usage are over.
