Winterizing and Freeze Prevention Technical Service Bulletin: Models:

Winterizing and Freeze Prevention Technical Service Bulletin: Models:
Technical Service Bulletin:
Winterizing and Freeze Prevention
Models: C1210ESC, C1210ES, C1050ES, C950ES, 940ES, 940ESO, 830ES
Introduction


Please note that the installation instruction manual states that
the water heater must not be installed in a location where it may
be exposed to freezing temperatures. If the heater must be left
in a space that is likely to experience freezing temperatures, all
water must be drained from the heater. Freeze damage is not
covered under the warranty.
NOTE: Use of agents like anti-freeze are not recommended as
they may cause damage to the water heater’s internal components.
!
6. Using an air compressor, blow short bursts of air (100PSI max)
into the outlet water connection until there is no water coming
through the inlet water connection of the heater. (Fig. 1)
Figure 1
WARNING
WATER HEATERS EQUIPPED WITH
FREEZE PREVENTION WILL NOT BE
PROTECTED FOR LONG DURATIONS
OR EXTREME DROPS BELOW FREEZING.
IN THESE CASES, THE WATER HEATER
MUST BE PROPERLY WINTERIZED.
ANY DAMAGE FROM FREEZING IS NOT
COVERED UNDER THE WARRANTY.
Tools needed:

Bucket

Adjustable wrench

Air compressor/compressed air
Preparation
1. Press on/off switch on the water heater to the off (O) position
and unplug power supply cord.
2. Shut off gas supply to heater.
3. Shut off the water supply to the water heater using installer
supplied cold water shutoff valve.
4. Open hot water taps to drain and relieve pressure from the
plumbing system. If water continues to flow after 5 minutes, a
plumbing crossover is present and must be corrected.
5. Disconnect inlet and outlet water pipes from the water heater.
Place a small bucket underneath the water heater to catch
residual water remaining inside the water heater.
Data subject to change without notice | Printed in the USA | BTC 740002304 B | 06.2011
Short bursts of compressed air
(100PSI Max)
7. Reconnect water fittings and return heater to service when
danger of freezing has passed.
Bosch Thermotechnology Corp.
50 Wentworth Avenue
Londonderry, NH 03053
Tel: 1-800-283-3787
Fax: 1-603-584-1687
www.bosch-climate.us
Bosch Thermotechnology Corp.
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