UTICA BOILERS MAHF-75 Installation, Operation And Maintenance Manual page 91

1st Degree Burn
Water
Temperature Exposure Time For
Setting An Adult
120° F 1 minute
130° F 5 seconds
140° F 2 seconds
150° F 1 second
160° F Instantaneous
N ot e : Warning for I nfant s, Children, and Elderly:
Great care m ust be t aken when exposing t he
aforem ent ioned groups t o warm or hot wat er as t hey
can be badly burned in exposure t im es less t han half
of t he t im e for an adult .
Provided Wiring and Piping illust rat ions
N o t e
are m eant t o show syst em concept s only.
I nst aller is responsible for all equipm ent
required by aut horit y having j urisdict ion.
Arrange piping t o prevent wat er dripping
N o t e
ont o boiler.
All piping diagram s are shown wit h opt ional DHW I ndirect
Tank where applicable.
The Labor Saver Piping Manifold, which is supplied wit h
each boiler, is shown wit h m ost of t he following piping
diagram s.
GEN ERAL I N FO RM AT I O N - H Y D RO N I C P I P I N G
2nd and 3rd Degree Burn
Exposure Time For An
Adult
5 minutes
30 seconds
5 seconds
1.5 seconds
0.5 seconds
Use of I ndirect W a t er H ea t er ( DH W ) H ea t ing
Only Boiler:
Sensors supplied wit h t his boiler are
N o t e
propriet ary t o t he m anufact urer. Use of
alt ernat e sensors WI LL dim inish boiler
perform ance.
☐ Use DHW sensor kit 550003189 t o int erface wit h
boiler. Wire t o M2 t erm inals # 3 and # 4. Except ion: not
applicable for t he 165 m odel, use aquast at for indirect
t ank cont rol.
☐ For heat ing only boilers wit h DHW out let connect ion,
see page 4, indirect wat er heat er shall be piped
ut ilizing t he int ernal boiler pum p. See pages 10 and 13.
☐ Locat e t ank as close t o boiler as possible.
☐ See I ndirect Tank Perform ance chart , page 40 of t his
m anual.
☐ Change P03 on boiler for application as specified on the
applicable wire diagram in t his m anual or Boiler Cont rol
Sect ion 9 of I nst allat ion, Operat ion & Maint enance
Manual supplied wit h t he boiler.
Use of Buffer Ta nk :
☐ I f using int ernal boiler pum p, m anifold shall be cut for
use as shown on page 24. I ncrease pipe size t o m at ch
Buffer tank connections as shown.
☐ Locat e t ank as close t o boiler as possible.
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PN 240012875 REV. D [ 03/ 15/ 2022]