Specifications
paste into the insulation, the use to coat each heat pipe tip with a thin layer  and remove any excess  from 
the tip. Using this method half a tube can coat 30 tubes. 
d) Shake:  Heat pipes  contain a small amount of copper  powder, which aids  in heat transfer  and provides 
freeze protection within the heat pipe itself. To ensure that the powder is  at the bottom of the heat  pipes, 
where  is  needs to  be,  before  installing  the  tube  and  heat  pipe,  they  should  inverted  (Fat  bulb  down), 
returned upright (Fat bulb at top)  and then shaken up and down a few times  to ensure the powder  has  all 
returned to the bottom. This should be  done at ground level where there is  no risk  of hitting the tube on 
another object.
 NOTICE
Donʼt forget to “shake” the tubes with heat pipes inserted as failure to do so may 
negatively effect the freeze protection properties. 
5.7.2. Heat Pipe and Evacuated Tube Insertion
a) Lubricate Tube: Lubricate the top outer surface of the evacuated tube with a small amount of water. This 
facilitates  easy insertion past the manifold rubber ring seal.   A small pump spray bottle is  the best method 
for carrying and applying the water. 
Note: DO NOT SPRAY WATER INTO THE EVACUATED TUBE
b) Insert Tube: While ensuring the metal spring plate is  sitting in the mouth of the evacuated tube, firmly 
hold the evacuated tube and guide the heat pipe tip in past the manifold rubber seal and into the heat pipe 
port.   Ensure the heat pipes  are at the TOP DEAD  CENTER of the evacuated tube and therefore aligned 
correctly with the heat pipe port.
c) Insert Tube - Rotating: Using no more than a 1/8
th
 turn left and right twisting action, push the evacuated 
tube up into the manifold.   The neck  of the evacuated tube will push against the spring at the base of the 
heat pipe tip, forcing it fully into the port.   DO NOT over  rotate the tube when inserting otherwise the heat 
pipe will be turned out of alignment with the top of the tube, which will prevent proper heat pipe operation.
d) Correct Insertion Depth: The heat pipe and evacuated tube are fully inserted once the black coating of 
the evacuated tube has  disappeared up into the manifold   and no clear glass  above the coating is  visible. 
The bottom of the tube will  sit so that the groove on the rubber  cap lines  up with clip point on the bottom 
track.
e)  Secure  Tube:  As each  tube  is  inserted  (recommended) or,  alternatively,  once  all  tubes have  been 
inserted, secure the tubes to the bottom track using the stainless steel clips as follows:
Step 1. Position the rubber cap so it is aligned with the bottom track and the Apricus  logo is at the top. 
This ensures  that drain holes  in the cap are properly positioned. It DOES NOT have to be pushed hard 
up on the tube.
Step  2.  Line  up the  clip with  the  hook on  the  bottom  track and push 
down over the rubber cap. Favoring whichever side is  more natural for 
you. When it engages you will hear a “click.” 
Step 3. Without losing the first hook, center the clip over the top of the 
rubber cap and push down the other side until it “clicks” into position.
Step 4. Check to ensure both sides are correctly clipped over the hooks.
f) Clip Removal:  The clip can be removed by using a screwdriver  or needle 
nosed pliers  to pull  each side of the clip down and outward. Very little force is 
required.
g) Tube Movement: If clipping tubes  after all the them have been inserted, it 
may  be  necessary  to  push an  adjacent  tube  slightly  off  to  the  side,  while 
attaching the clip to allow enough room to operate.  There is  some flexibility 
in the manifold connection and the heat pipe and tube will  not be damaged 
by this slight sidewards movement. Do not be too aggressive.
Apricus Solar Collector Installation & Operation Manual - USA
Copyright © 2011 – Apricus Inc Doc: A7-05.4.12-PB Page 42 of 129










