Dettson HYDRA COMPACT HYDRAC03-M2401M, Installation Instructions And Homeowner'S Manual

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Figure 2 : Boiler components
Freeze protection (when required)
WARNING
Only propylene glycol may be used in this
hydronic heating system, to prevent freezing.
It is recommended to add a maximum of 50%
of propylene glycol mixture to ensure proper
operation.
Do not use automotive anti-freeze, ethylene
glycol or any undiluted anti-freeze.
If the above recommendations are not
followed, severe personal injury, death or
substantial property damage can result.
All installations must include the following items:
a. 1 pressure regulator, adjusted to 12 psi, must be installed
between the boiler and the main water supply in the building;
b. 1 expansion tank, pre-pressurized to 12 psi and of appropriate
size;
c. 1 or more automatic air purge valves;
d. 1 or more circulating pumps of appropriate capacity.
CAUTION
To avoid water damage and/or scalding due to relief
valve operation, a discharge line must be connected to
the valve outlet and run to a drainage area. The
discharge line shall be installed in such a way that it
will allow for the complete drainage of the valve and
the discharge line.
1.7) INSTALLATION OF THE BOILER
At the time of installation, the following steps should be followed.
Refer to Figure 3, 4, 5, 6 and 7.
1. Choose an appropriate location. Mount the boiler securely on
the wall, with the help of the mounting plate. Ensure that it is
level and that the minimum clearances are observed;