Section Vi: Water Connections - Bradford White UCG100H199 Installation & Operation Manual

Gas-fired commercial water heater

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Installation & operation manual (60 pages)

Installation and operation manual (60 pages)

Table Of Contents

Table of Contents

NOTE: BEFORE PROCEEDING WITH THE INSTALLATION, CLOSE THE MAIN WATER SUPPLY VALVE.

If sweat fittings are to be used, DO NOT apply heat to the nipples on the side of the water heater. Sweat the

tubing to the adapter before fitting the adapter to the water heater connections. It is imperative that heat is

NOT applied to the nipples containing a plastic liner.

Failure to install and maintain a new, listed temperature and pressure relief valve will release the

manufacturer from any claim which might result from excessive temperature and pressures.

Keep clear of combination temperature and pressure relief valve discharge line outlet. The discharge may be

hot enough to cause scald injury. The water is under pressure and may splash.

Instructions for Connections

1. Before proceeding with the installation, CLOSE the main water supply valve. After shutting OFF the main

water supply, open a faucet to relieve the water line pressure to prevent any water from leaking out of the

pipes while making the water connections to the water heater. The COLD water inlet and HOT water outlet

are identified on the water heater. Make the proper plumbing connections between the water heater and the

plumbing system to the house. Install a shut-off valve in the cold water supply line.

2. If this water heater is installed in a closed water supply system, such as the one having a back-flow

preventer in the cold water supply, provisions must be made to control thermal expansion. Do NOT operate

this water heater in a closed system without provisions for controlling thermal expansion. Warranties do

NOT cover damages from thermal expansion, such as pressure bulges and/or deformities. Your water

supplier or local plumbing inspector should be contacted on how to control this situation.

3. After installation of the water lines, OPEN the main water supply valve and fill the water heater. While the

water heater is filling, open several hot water faucets to allow air to escape from the water system. When a

steady stream of water flows through the faucets, close them and check all water connections for possible

leaks.

4. NEVER operate the water heater without first being certain it is filled with water.

Scalding

This water heater can deliver scalding temperature water at any faucet in the system. Be careful whenever

using hot water to avoid scalding injury. Certain appliances such as dishwashers and automatic clothes

washers may require increased temperature water. By setting the thermostat on this water heater to obtain the

increased temperature water required by these appliances, you may create the potential for scald injury. To

protect against injury, you should install an ASSE approved mixing valve in the water system. This valve will

reduce point of discharge temperature by mixing cold and hot water in branch supply lines. Such valves are

available from the manufacturer of this water heater or a local plumbing supplier. Please consult with a

plumbing professional for installation of mixing valves.

Table 5 – Approximate

Time/Temperature Scald Chart

APPROXIMATE TIME/TEMPERATURE

RELATIONSHIPS IN SCALDS

120°F (49°C)

125°F (52°C)

130°F (54°C)

135°F (57°C)

140°F (60°C)

145°F (63°C)

150°F (66°C)

155°F (68°C)