System Start Up; Fill Condensate Trap With Water - UTICA BOILERS MAHF-75 Installation, Operation And Maintenance Manual

9 .3 Syst em St a rt Up
Follow all codes and regulations when filling the boiler.
Use drain t aps t o allow syst em t o com plet ely drain.
Thoroughly flush the heating system before boiler is
connected and again after first heating season.
• Boiler is fitted with automatic air vent positioned on
pump Vent and is fitted with adjustable sealing cap.
See Figure 9- 1.
• Open central heating flow and return valves. Spindle
is flat in-line with valve.
• Open fill point valve on filling system until water
begins to flow. To aid venting boiler drain may be
open until water flows out. Close drain as soon as
wat er appears.
• During init ial syst em air purge open valve connect ed
t o t op left of heat exchanger. Open four ( 4) full
t urns count erclockwise unt il st eady st ream of wat er
is wit nessed. Close fully t urning clockwise wit h no
t ools needed. See Figure 9- 1.
• Syst em s using radiat ors t o rem ove air - Vent each
radiat or in t urn, st art ing wit h lowest in t he syst em .
• I t is IMPORTANT t he pum p is properly vent ed
t o avoid running it dry and dam aging it s bearings.
Unscrew and rem ove cap from cent er of pum p. Use
screwdriver. Rot at e exposed spindle about half t urn,
replace cap.
• Check operat ion of heat ing pressure relief valve. Pull
lever on t op of valve upwards lift ing t he seat . This
will allow wat er t o escape from syst em . Check wat er
is escaping from t he syst em .
• Open com bi m odels only dom est ic cold wat er inlet
valve. Turn on all hot water taps. Allow water to flow
until no air is present. Turn off taps. See page 4 -
Physical Dat a and sect ion 2.7 Operat ional Feat ures.
9 .4 Fill Condensa t e Tra p w it h W a t er
!
W ARN I N G
Asphyxiat ion hazard! Fill condensat e t rap
before st art ing boiler t o avoid com bust ion
product s escaping boiler. Failure t o follow t hese
inst ruct ions could result in deat h or serious
inj ury.
• To fill the condensate trap pour water into exhaust
vent until water begins to flow through the siphon.
• Visually inspect t he siphon t o ensure it is full wit h
clean wat er.
• During operat ion check condensat e t rap t o ensure it
drains properly.
Condensate trap must be manually filled with
N o t e
wat er at init ial st ar t up.
9 - START U P PROCED U RE
FI GURE 9 - 1 Condensa t e Dra in Assem bly
150 Model shown ( locat ion sim ilar in all sizes)
Condensat e Drain
Connect ion
4 9
Air
approxim at ely
Purge
1 cup of wat er
Valve
into flue way
240013503 REV A, [ 03/ 15/ 2022]
Pour
of boiler.
Condensat e
Tray
Air Vent