13
WARMBOARD COMFORT SYSTEM // GAS
Once the system is plumbed and pressure tested with
air (T&M Installation Guide), the next step is to fill the
system with water and purge the air in the lines.
Air in a closed loop heating system can create noise
and inhibit the flow of water. Follow these steps to
save hours or days of frustration.
Purge Air, Fill with Water
Follow these steps to fill and purge air the system.
This should be done one manifold at a time. In this
example, we’ll begin with Manifold 1 (illustration).
f
Thread a discharge hose on to valve
A
,
and ensure the other end of the hose reaches
the exterior of the house (or drain)
f
On valve
A
, make sure the ball valve is closed
and the hose bib is open
f
Close all hose bibs and ball valves on
the remaining manifold return lines (
B
,
C
)
f
On the supply side, close the hose bib
and open ball valve
D
f
To fill Warmsource and the Manifold 1 loops
with water (city or well supply), lift the fast fill lever
on the pressure reducing valve
E
f
Check each loop flow meter on Manifold 1 and
confirm good flow is taking place. You may need to
open the loop flow restrictors (pg. 14, step 4)
f
Continue filling the system with water for 10–15
minutes until air cannot be seen or heard escaping
the hose
f
Close the fast fill lever, then slowly close hose bib
A
f
Manifold 1 is now complete. Repeat this process for
each manifold (
B
,
C
)
f
Once complete, ensure the pressure gauge located
inside Warmsource reads 12–18 PSI
Propylene Glycol
In some situations, it may be necessary to add
propylene glycol to prevent freezing. To do this,
open ball valve
D
and add via the hose bib.
Use the manufacturer’s recommendation for the
correct mix (generally 10-30%).
ONLY
use propylene
glycol for freeze protection.
To fill the system with a propylene glycol/water
solution, we recommend a Liberty 331 Portable
Transfer Pump, or equivalent (homedepot.com).
To maintain the propylene glycol feed for many years,
we recommend the Axiom MF200 Pressure Pal.
FILLING & PURGING
Reference the Lochnivar Noble Manual (pg. 59)
for allowable mineral levels and quality of the
water. Filtered water or a corrosion inhibitor may
be required.
D
*Size according on WCS Design Drawings
A
B
C
D
E
F
G
3/4
" Combo ball valve/hose bib*
3/4
" Combo ball valve/hose bib*
3/4
" Combo ball valve/hose bib*
1
1/4
" Combo ball valve/hose bib
Fast fill lever/pressure reducing valve
Backflow preventer
1/2
" ball valve
C
A
B
E
F
G
Manifold 1
Manifold 2
Manifold 3
Manifold 1
Manifold 3
Manifold 2
SUPPLY
RETURN
