Miele PDR 914 Operating And Installation Instructions page 62

*INSTALLATION*
Installation
Gas supply
Required flow rate
Natural gas
62
 Before completing commissioning, maintenance, conversion,
and repair work, all gas-conducting components – from the manual
shut-off valve to the burner jet – must be checked for leaks.
Particular attention must be paid to the measuring stubs on the gas
valve. Checks must be performed when the burner is both switched
on and switched off.
Installing thermal shut-off equipment on site is recommended.

If gas-heated appliances are accessible to anyone, it is also neces-

sary to check whether a gas flow monitor needs to be used.
Appliance type Rated heat load (Hi)
PDR 914/514
PDR 918/518
PDR 922/522
PDR 928/528
PDR 944/544
The connected load is based on the following consumption calorific
values:
Natural gas: 913 BTU/ft³ (34.02 MJ/m³) (Hi))
Liquid propane: 19,625 BTU/lb (45.65 MJ/kg (Hi))
Natural
gas
9' 10" 16' 4 7/8"
(3 m) (5 m)
Internal di-
ameter
¾" 2.766 CF 2.177 CFM
(20 mm) M (3.7 m³/h)
(4.7 m³/h)
1" 5.061 CFM 4.061 CF
(25 mm) (8.6 m³/h)
(6.9 m³/h)
1 ¼" 9.416 CFM 7.297 CFM
(32 mm) (16.0 m³/ (12.4 m³/
h)
1 ½" 15.595 CF 12.064 CF
(40 mm) M
(26.5 m³/ (20.5 m³/
h)
2" 35.31 CFM 27.66 CFM
(50 mm) (60.0 m³/ (47.0 m³/
h)
Natural gas
0.936 CFM
15 kW
(1.59 m³/h)
1.118 CFM
18 kW
(1.90 m³/h)
1.342 CFM
21.5 kW
(2.28 m³/h)
1.866 CFM
30 kW
(3.17 m³/h)
2.242 CFM
36 kW
(3.81 m³/h)
Length of gas line
32' 65' 7 3/8"
9 11/16" (20 m)
(10 m)
Maximum flow rate
1.53 CFM 0.942 CF
(2.6 m³/h) M
(1.6 m³/h)
2.825 CF 1.824 CFM
M M (3.1 m³/h)
(4.8 m³/h)
5.12 CFM 3.649 CF
(8.7 m³/h) M
h) (6.2 m³/h)
8.533 CF 6.062 CF
M M M
(14.5 m³/ (10.3 m³/
h) h) h)
19.421 CF 13.536 CF
M M
h) (33.0 m³/ (23.0 m³/
h) h)
Liquid propane
2.6 lb/h
(1.18 kg/h)
3.13 lb/h
(1.42 kg/h)
3.75 lb/h
(1.70 kg/h)
5.22 lb/h
(2.37 kg/h)
6.26 lb/h
(2.84 kg/h)
98' 5 1/8" 164' 1/2" 328' 1"
(30 m) (50 m) (100 m)
0.647 CF 0.412 CF 0.177 CFM
M M (0.3 m³/h)
(1.1 m³/h) (0.7 m³/h)
1.412 CFM 1.118 CFM 0.53 CFM
(2.4 m³/h) (1.9 m³/h) (0.9 m³/h)
2.942 CF 2.236 CF 1.412 CFM
M M (2.4 m³/h)
(5.0 m³/h) (3.8 m³/h)
4.943 CF 3.825 CF 2.354 CF
M M M
(8.4 m³/h) (6.5 m³/h) (4.0 m³/h)
11.181 CFM 8.828 CF 5.885 CF
(19.0 m³/ M M
h) (15.0 m³/ (10.0 m³/
h) h)