
Difference (ΔT) between collector temperature (T1) and Tank1 temperature
(T2) that will automatically disengage pump1. Set to 4
°
F
Select the minimum collector temperature required for system start-up. Set to
85
°
F
When the water temp. at the location of T3 drop below this setting P3 will start.
Set to 125
°
F
When the water temp. at the location of T3 exceeds the Start temperature plus
the Hysteresis setting, P3 will shutoff. Set to 30
°
F
7.12. Replace Front Case
Push the front case into place while making sure to feed the pump power cable through the hole into the
controller enclosure. The casing will simply lock into place.
8. Direct Flow Pump Station Installation
The following instructions are specific to the Apricus Direct Flow Pump Station, which is
designed for use in Apricus OG-300 certified open loop systems.
8.1. Design
a) The Apricus Direct Flow Pump Station (ADFPS) is specifically designed for use with the Apricus solar
collector in a direct flow format. It is NOT suitable for closed loop or drain-back systems.
b) The ADFPS has the following key features:
☀ Single Speed Stainless Steel Grundfos pump (with integrated check valve)
☀ Controller mounted directly into pump station ☀ 3/4” Quick connector push fittings
☀ 75 psi pressure relief valve ☀ Flow meter with built in balancing valve
☀ Power outage drain valve for freeze protection even without power.
8.2. Direct Flow Pump Station Technical Data
8.375” / 213 mm (With Insulated Cover)
¾” (7/8” OD copper) Quick Connect Fitting
¾” (7/8” OD copper) Quick Connect Fitting
Pressure Relief Valve Connection
Pressure Relief Valve Pressure
Apricus Solar Collector Installation & Operation Manual - USA
Copyright © 2011 – Apricus Inc Doc: A7-05.4.12-PB Page 63 of 129
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