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Solar pump stations
© Copyright 2015 Caleffi
INSTALLATION AND COMMISSIONING MANUAL
Function
Solar pump stations are used on the primary
circuit of solar thermal water heating systems to
control the temperature of the hot water storage.
The pump inside the unit is activated by the signal
from a differential temperature controller. The unit
contains the functional and safety devices for
optimum circuit control. They are available with
both supply and return connection or with return
connection only.
The iSolar™PLUS temperature differential controller
(optional) is suitable for management and control
of 10 pre-configured solar thermal system
arrangements installed in an optional insulation
jacket that mounts to the top of the pump station
for a nice clean assembly and simplified wiring
(code 278011).
CONTENTS
Function
1
NA28237
www.caleffi.com
278-279 series
1
2-3
4
5
6
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Table of Contents
Summary of Contents for Caleffi solar 279 series
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Page 1: Table Of Contents
NA28237 www.caleffi.com Solar pump stations 278-279 series © Copyright 2015 Caleffi INSTALLATION AND COMMISSIONING MANUAL CONTENTS Function Important Product range Technical specifications Characteristic components Installation Filling the system Function Flushing the system Commissioning Solar pump stations are used on the primary... -
Page 2: Important
IMPORTANT The following instructions must be read and understood before installing, commissioning and servicing the circulation unit. The safety symbol is used in this manual to draw attention to safety instructions. The meaning of this symbol is as follows: CAUTION! YOUR SAFETY IS INVOLVED. FAILURE IN FOLLOWING THESE INSTRUCTIONS MAY RESULT IN INJURY. - Page 3 Performance Pump model Solar 15-68 Suitalbe fluids: water, glycol solution Body: cast iron GG 15/20 Max. percentage of glycol: Electric supply: 115 V 60 Hz Maximum working temperature: Max. pressure: 150 psi (10 bar) air separator side supply: 320°F (160°C) Max.
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Page 4: Characteristic Components
Characteristic components 1) Circulation pump 2) Safety relief valve 3) Fill/drain valve with control lever 4) Instrument holder fitting with pressure gauge 5) Flow meter 6) Air separator with air vent and shut-off valve with check valve 7) Supply temperature gauge 8) Return temperature gauge 9) Pre-formed shell insulation 10) Shut-off ball valve with check valve with temperature gauge... -
Page 5: Installation
Filling the system • O pen the shut-off valve coupled with the automatic air vent, installed at the highest point of the solar thermal system. • O pen the shut-off and check valves, located where the temperature gauge(s) insert. • F ill by with a pump, using the valve (A) located at the lowest point of the system, until air no longer comes out of the air vents. If the solar thermal system requires the use of glycol-water solution top- off the system using the same glycol-water mixture. -
Page 6: Flushing The System
Flushing the system • C lose the flow meter adjustment ball valve (1). and open the fill/drain valve (2). • C onnect an external (separate) pump to the safety relieve valve fill/drain valve (3), allow the medium to flow through the solar panels and the heat exchange circuit until it flows out of the flow meter fill/drain valve (4). • B riefly open the flow meter ball valve (4) to expel all air from the system. • L eave the external pump running on the system for a few minutes to ensure correct flushing. -
Page 7: Shut-Off And Check Valves
Shut-off and check valves Flow meter shut-off valves The flow meter is a flow rate measuring device, float equipped, with equipped with a built-in check an adjustment ball valve. valve, positioned inside the ball. The meter has a range of 2 to 8 gpm. The flow meter must always be installed in a vertical position. -
Page 8: Application Diagrams
Shut-o valve Application diagrams Pump Shut-o valve Air vent Expansion tank Pump Temperature gauge Air vent Safety valve Expansion tank Temperature gauge Safety valve Automatic lling Automatic lling...