Glow-worm Xtramax - Manual (Page 15)

15
4000116705-2
9129
Discharge from
HTG prv on jig
Discharge from
DHW safety
valves
Gully
Diagram 7.1
Valve outlet
size
Maximum resistance allowed
expressed as a length of straight
pipe i.e. no elbows or bends
Resistance created
by each elbow
or bend
Minimum size of discharge
pipe D2 from tundish
Minimum size of
discharge to tundish
D1
G 1/2 15 mm 22mm up to 9 m 0.8 m
28 mm up to 18 m 1.0 m
35 mm up to 27 m 1.4 m
G 3/4 22 mm 28 mm up to 9 m 1.0 m
35 mm up to 18 m 1.4 m
42 mm up to 27 m 1.7 m
G 1 28 mm 35 mm up to 9 m 1.4 m
42 mm up to 18 m 1.7 m
54 mm up to 27 m 2.3 m
Discharge pipe (D2) from
turndish with continuous fall see table
above for size examples.
Discharge pipe (D1) from
temperature relief valve to turndish
Tundish
(Supplied)
Fixed grating
Trapped
gully
Safety
device eg.
temperature
relief valve
500mm
max.
300mm min.
9131
7 Safety Discharge
8 Fixing Jig
D1 D2
The fixing jig is made up, from left to right, as follows:
A - Heating return fitting with isolating valve (v) and drain knob (u).
B - Cold water inlet fitting with isolating valve (m) and factory fitted flow restrictor and filter (not shown).
C - Heating flow fitting with isolating valve (q) drain knob (r) and safety valve (10).
D - Domestic hot water outlet.
E - Gas service cock.
Diagram 8.1
9126
Tundish
(Supplied)
➜
u
➜
m
v
q
r
10
A
B
C
D E
9317
9317
(Fitted inside) Flow
restrictor and cold water
inlet filter