Boiler output
Number of space heating zones calling
Space heating target water temperature, and the
Amount of boiler water flow split between the space heating and zones and the water heater
zone.
2.4 Locating the water heater
Locate the water heater in an area where water leakage from the tank or connections will not result in
damage to areas adjacent to the water heater or to lower floors of the structure. If unable to find an
appropriate location, you must install a suitable drain pan under the water heater and connect the
drain pan to a drain.
To enable easy access for servicing, install the water heater as close to the boiler as far as is
practicable. The appliance is designed for installation on combustible flooring and in alcoves,
closets, etc.
Surface
Distance from Combustibles
For Service
Front
1"
24"
Rear, Right and Left Sides
1"
1"
Top
1"
1"
Bottom
0"
0"
Table 12
Clearances from heater jacket
2.5 Temperature and pressure relief valve
1. Supply a temperature and pressure relief valve rated to ANSI Z21.22 and that has a rating
greater than the gross input of the boiler connected to the water heater.
2. Install the temperature and pressure relief valve in the tapping on the side of the tank labeled
"Relief Valve".
3. Pipe the outlet of the relief valve to an appropriate location (floor drain or drain pan)
terminating within 6" of an appropriate drain location. Pipe the relief valve piping down toward
the outlet of the piping, so that the piping and the valve can fully drain. Never terminate the
relief valve piping outdoors where it may freeze.
4.
Do not install a shut off valve between the water tank and the relief valve. Do not plug the
outlet of the relief valve.
18
Section: Pre-installation overview
Summary of Contents for INTERSTAR IWT Series
Page 39: ......
