Clean Energy CE-340, Owner'S Manual, Page: 23 / 54

23
BOILER INSTALLATION
Design and Installation of the Hydronics System:
NOTE: Each install is unique. Contact your plumbing and hydronics expert to determine the
layout and design of the system.
(1) Water Temperature returning to the boiler must be above 140
O
F. This will reduce
condensation and thermal shock to the boiler.
(2) The circulator should pump away from the expansion tank to reduce air problems.
(3) Controls and valves must be used for muliple zones and for in floor heat to ensure the
water temperature supplied to the floor is not too hot, and the water temperature returning
to the boiler is not too cold.
(4) The expansion tank must be sized according to the amount of water in the entire hydronics
system. Take into account if antifreeze is added to the system.
(5) Serious damage will occur if leaks occur in the hydronics system and excessive make-up
water is being added. Make-up water will introduce oxygen which will lead to corrosion.
(6) Incorporate an air seperator and air vent to properly purge all air from the system to allow
proper water circulation.
(7) Refer to Figure 21 for typical single zone connections.
(8) The Pressure Reducing Valve (Boiler Fill Valve) should be set at 12 psi.
(9) Refer to Figure 20. A water pressure safety relief valve must be installed (supplied with
boiler). Run a pipe from the relief valve discharge to within four inches of the floor for safe
pressure relief.
Recommended Microprocessor Boiler Control Settings:
Hi Limit 180
O
F
Hi Limit Differential 20 O F
Low Limit 140
O
F
Low Limit Differential 10 O F
Low Water Cut-Off Manual Reset - ON
If the Microprocessor Boiler Control is not
used, the following contols must be utilized for
safe boiler operation. Refer to Appendix A for
illustrations and wire diagrams.
Temperature Operating Control
- Clean Energy part# 50193
Low Water Cut-Off
- Clean Energy part #50194
Figure 20: Installing the Pressure Relief
CE70081
PRESSURE
RELIEF
VALVE