Hydronic Piping; General - ECR International COMBI 115 Installation, Operation And Maintenance Manual

Boiler rat ed at 50 psig ( 3.45 bar) m axim um
N o t e
allowable working pressure. Boiler provided wit h
30 psig ( 2.06 bar) safety relief valve.
When inst alling safety relief valve it m ust be
N o t e
inst alled in a vert ical posit ion wit h spindle at
t op.
Syst em pressure above 43 psi [ 2.96 bar] W I LL
N o t e
result in boiler shut t ing down.
FI GURE 6 - 1 Sa fet y Relief Va lve & TP Ga uge
System Supply System Supply
Safety Relief Safety Relief
Valve Valve
TP Gauge TP Gauge
W ARN I N G
!
• Poison hazard. Et hylene glycol is t oxic. Do not use
et hylene glycol.
• Never use aut om ot ive or st andard glycol ant ifreeze,
even et hylene glycol m ade for hydronic syst em s.
• Et hylene glycol can at t ack gasket s and seals used in
hydronic syst em s.
• Do not use pet roleum based cleaning or sealing
com pounds boiler syst em .
• Do not fill boiler or boiler system with softened
wat er.
• Use only inhibit ed propylene glycol solut ions
certified by fluid manufacturer as acceptable for use
wit h closed wat er heat ing syst em .
• Thoroughly clean and flush any system that used
glycol before inst alling new Boiler.
• Provide user wit h Mat erial Safet y Dat a Sheet
(MSDS) on fluid used.
6 - H YD RON I C PI PI N G
6 .1 Genera l
• Prim ary/ Secondary piping required.
• I nst all piping in accordance wit h aut horit y having
j urisdict ion.
• Support syst em piping and safet y relief valve discharge
piping. Boiler's int ernal piping and wall m ount bracket can
be dam aged if subj ect ed t o excessive weight .
The int ended use of t he int ernal heat exchanger pum p
is a boiler loop. Do not use as a prim ary syst em pum p.
• Size cent ral heat ing pum p ( and dom est ic hot wat er pum p,
if used) for syst em requirem ent s only. I nt ernal heat
exchanger pum p com pensat es for pressure drop t hrough
boiler int ernal piping and heat exchanger.
• Thoroughly clean and flush system before connecting to
boiler.
System Return System Return
• I f oil is present in syst em wat er, use approved det ergent
t o wash syst em .
• I t is necessary t o sem i- annually check t he wat er qualit y of
cent ral heat ing syst em s.
• Manufact urer recom m ends inst allat ion of m agnet ic dirt
separat or in t he hydronic syst em where t here are cast
iron or st eel com ponent s, or where t he previous boiler
was a cast iron heat exchanger. The abrasive, ext rem ely
fine sediment is difficult to remove and can deposit onto
heat exchange surfaces and accum ulat e in pum p cavit ies
causing reduced efficiency and premature wear.
• Flush syst em t o rem ove any solid obj ect s such as m et al
chips, fibers, or Teflon tape, etc.
• Flush syst em unt il wat er runs clean and piping is free of
sedim ent .
• Use purge valve to flush zoned systems, each zone
separat ely. I f purge valves and isolat ion valves are not
inst alled, inst all t hem t o properly clean t he syst em .
• When purging inst allat ions t hat include st anding iron
radiat ors and syst em s wit h m anual vent s at high point s,
st art wit h nearest m anual air vent . Open t he vent unt il
water flows out, then close vent. Repeat this procedure,
working t oward furt hest air vent .
• I nst all a basket st rainer if large am ount s of sedim ent is
present . Keep basket clear of sedim ent build up.
• Ensure piping in t he heat ing syst em has an oxygen
barrier.
3 2
NOTICE
240013687 REV A [ 09/ 01/ 2022]