Solar Water Heating

Notes:
- Both of these pump supply lines MUST originate from the same “Line in” wire.
- Transformer, contactor & all 120VAC connections must be located inside of a suitable CSA enclosure (box).
- Wiring must be done by qualified electrician and must meet all local codes.

NOTES:
AV - automated air vent (with shut-off)
P1 - existing boiler loop pump
P2 - solar pump
T1 - collector temperature
T2 - return floor loop temperature
T3 - ambient room temperature
Solar controller energizes both pumps when T1 is higher than T2
Solar controller activates 3-way valve and turns on P2 when T1 or T2 exceed preset limits
Room thermostat activates 3-way valve when T3 is above desired temperature
If P1 runs continually, solar controller only needs to control P2
Boiler and solar temperature set points should be configured such that boiler cuts out a few degrees
lower than the solar cut-out, to give solar heating priority over boiler heating.
Boiler sensors & control, isolation, bypass, charge ports, etc. are required, but have not been shown.
Freeze protection must be suitable for exposed outdoor piping.

NOTES:
AV - automated air vent (with shut-off)
P1 - system pump, sized based on solar and in-floor loop
T1 - collector temperature
T2 - return floor loop temperature
Solar controller energizes P1 when T1 is higher than T2
Solar controller activates 3-way valve and P1 when T1 or T2 exceed preset limits
Optional - Room thermostat activates 3-way valve when desired ambient temperature is reached
Freeze protection must be suitable for exposed outdoor piping - i.e. 50% propylene glycol

AV - automated air vent (with shut-off)
P1 - floor loop(s) pump
P2 - solar pump
T1 - collector temperature
T2 - return floor loop temperature
Solar controller energizes both pumps when T1 is higher than T2
Solar controller activates 3-way valve and turns on P2 when T1 or T2 exceed preset limits
Boiler sensors & control, isolation, bypass, charge ports, etc. are required, but have not been shown.
Solar loop anti-freeze must be suitable for exposed outdoor piping (50% propylene glycol).
In-floor anti-freeze must protect against worst-case expected temperatures (30% to 40% propylene glycol)

NOTES:
AV - automated air vent (with shut-off)
P1 - existing boiler loop pump
T1 - collector temperature
T2 - return floor loop temperature
P1 must be continually running, or additional control turns P1 on when T1 is above a set point
Solar block activates heat dissipator when T1 or T2 exceed preset limits
Boiler and solar temperature set points should be configured such that boiler cuts in a frew degrees warmer
and/or cuts out a few degrees lower than the HBX, to give solar heating priority over boiler heating.
Boiler sensors & control, isolation, bypass, charge ports, etc. are required, but have not been shown.
Solar loop anti-freeze must be suitable for exposed outdoor piping (50% propylene glycol).

NOTES:
AV - automated air vent (with shut-off)
P1 - in-floor loop(s) pump
T1 - collector temperature
T2 - return floor loop temperature
P1 is turned on when T1 temperature is above a setpoint (e.g.: 25C)
Solar block activates heat dissipator when T1 or T2 exceed preset limits
Sensors, control, isolation, bypass, charge ports, etc. are required, but have not been shown.
Solar loop anti-freeze must be suitable for exposed outdoor piping (50% propylene glycol).
In-floor loop anti-freeze must be suitable for expected conditions (e.g. 30% to 40% propylene glycol)