EX Series Quick Reference Installation Guide
Boiler Mounting
(
Section 3.0 of the manual
)
Venting
(Sections 3.5)
Gas Supply
(
Section 3.9
)
Follow the venting specifications and information for the correct venting
material and venting length provided in the above sections of the
manual.
Ensure that sidewall configurations have adequate vertical separation,
and that exhaust plumes are well away from all building air intake vents.
Ensure that all venting material is sloped towards the boiler at
a minimum of ⅝″ per foot or at a slope required by the PP vent
manufacturer, whichever is greater.
Ensure that PPs venting is supported every 36″ (min).
On longer horizontal runs of PVC and CPVC, increase the grade to ⅜″ or
more.
Fully insert the approved venting material into the boiler’s exhaust
outlet, and tighten the clamp to ensure
the venting connection is locked in
place.
Check that the venting is securely
attached to the exhaust flue of the
boiler by pulling on the venting.
Important:
Use appropriate appliance adapters when using PPs
or stainless steel venting.
Condensate Trap
(
Section 3.6
)
1. Fill the trap assembly with water.
2. Attach the trap to the drain elbow.
3. Tighten the union nut.
4. Check for leaks.
For gas delivery to the boiler, we recommend using hard piping
rather than flexible piping. If you use flexible piping, ensure that
the gas pipe size is appropriate for the maximum BTU input of
the boiler.
Minimum Gas Pressure
4" w.c.
Maximum Gas Pressure
14" w.c.
Size piping for sufficient sustained gas delivery at sufficient
pressure to the boiler.
Recommended Supply Pressure at Full Load
Natural Gas
7"
Propane
10"
•
Ensure that there is a minimum of 6 feet of piping between
the boiler and gas regulators.
•
Use a manometer to test that gas delivered to the boiler is
delivered at sufficient pressure and that “lock up” does not
exceed the maximum pressure.
•
If using a 5 psi to inches vented gas regulator, always oversize
the vent pipe to prevent hunting of the gas regulator when
boilers are firing at lower output levels.
In retrofits with existing copper gas pipes, clean and clear the
gas piping of any debris before connecting to the boiler. Failure
to do so can result in a blocked gas valve and inconsistent
performance.
Maximum Pipe
Length by Model
l
1¼
″
IPS
1 ½
″
IPS
2
″
IPS 2 ½
″
IPS
EX 400
(Natural Gas)
150’
350’
1000’
>2000’
EX 400
(Propane)
400’
900’
>2000’ >2000’
EX 500 (Natural Gas)
100’
200’
700’
1800’
EX 500 (Propane)
250’
600’
2000’
>2000’
EX 700
(Natural Gas)
50'
100'
350'
800'
EX 700 (Propane)
150'
300'
900'
2000'
EX 850 (Natural Gas)
40'
80'
250'
600'
EX 850 (Propane)
100'
200'
700'
1600'
LWCO Errors
To clear LWCO errors caused by air:
1. Ensure that there is no air trapped in the boiler and
boiler piping.
2. On the touchscreen controller Main Menu, go to
Diagnostics
>
Advanced Diagnostics
>
Clear System
Errors
>
Yes
>
OK
.
Ensure that the boiler’s anchor brackets are securely bolted to the
floor.
QS003 Quick Reference Installation Guide - EX 400, 500, 700, EX 850
Important:
Before turning off the boiler, make sure it is in
“Standby” mode.
Low Gas Pressure Errors
(
Section 6.3.5
)
Every new install will require resetting the low gas pressure
switch. To do so, press on the red reset button.
Important:
Not applicable for construction heating. Fouled fans,
burners, and ignitors are not covered under warranty.
Low gas
pressure
switch
High gas
pressure
switch
Maximum Exhaust Venting Lengths
Exhaust Pipe Size
EX 400, EX 500
EX 700, EX 850
Sched.40; Rigid PPs
4" PVC/CPVC / Rigid PPs/SS
170' (each side)
n/a
6" PVC/CPVC / Rigid PPs/SS
n/a
120' (each side)
90° vent elbow
allow 5' equivalent allow 5' equivalent
45° elbow
allow 3' equivalent allow 3' equivalent
PPs 87-90° elbows
use 5' equivalent
use 5' equivalent
