Powrmatic NCA-G Series, NCA-G 200, NCA-G 300, NCA-G 100, NCA-G 150 Installation And Servicing Instructions
The NCA-G Range
CE
Installation and Servicing
Instructions
WARNING: THIS APPLIANCE MUST BE EARTHED
£2.50 When supplied separately.
NCA-G Range Issue 4 Feb 1999
CONTENTS
Section Title Page
1. Introduction 1
2. Technical Data 2
3. General Requirements 3
4. Installation 4
5. Air Distribution System 5
6. Commissioning & Testing 5
7. Servicing 6
8. Connections to Powrmatic
External Controls 7
9. Fault Finding 8
10. Short List of Parts 8
Tables Title Page
1. Dimensions 2
2. Performance Data 2
3.1 Burner Pressures - Natural Gas
Group H - G20 2
3.2 Burner Pressures - Propane - G31 2
4. Electrical Loadings 3
Figure Title Page
1. Gas Control Schematic NCA-G 100 - 300 6
2a. Gas Controls Layout NCA-G 100, 150 6
2b. Gas Controls Layout NCA-G 200, 300 6
3. Honeywell L4064N 7
Appendix Title Page
A Calculation Of Flue System Inside
Equivalent Resistance Back Cover
1. INTRODUCTION
The Powrmatic NCA -G range of gas fired for ced dr augh t, cl osed
flue, fanned circulation air heaters cover a heat output range
of 29.3 kW (100000 Btu/h) to 88.0 kW (300000 Btu/h) and
are intended primarily for heating commercial or industry
premises. They are certified for use on Natural Gas, Group H G20 and Propane - G31.
The heaters are for floor mounting and ar e av ailabl e in UF and
UD variants. (U - Upright; F - Freeblowing; D - Ducted).
NCA-G heaters have a cen trifugal f an assembly fitted upstr eam
of the combustion chamber / heat exchanger assembly to
circulate the air being heated.
Heaters are fitted as standard with fully automatic monoblock
forced draught gas burn ers and m onoblock gas contr ol assemblies.
Options include High/Lo w or modulatin g burner s, Deep V filters ,
proportional air dampers, combustion air inlet adaptors and
inlet and outlet duct spigots.
Each air heater must be conn ected t o a closed flue s ystem only.
Gas Safety (Installation & Use) Regulations 1994
It is law that all gas appliances are installed, adjusted and, if
necessary, converted by qualified persons* in accordance with
the above regulations. Failure to install appliances correctly
can lead to prosecution. It is in your own interests and that
of safety to ensure that the law is complied with.
* e.g. Corgi Registered
1
2. Technical Data
2.1 Dimensions
NCA-G 100 - 300 UF & UD Models
NCA-G 200UD SHOWN
H
D
F
C
G
B
FRONT
VIEW
A
SIDE
VIEW
B
FRONT
VIEW
Table 1 - Dimensions
A B C D F G H J K L M
NCA-G 100 1112 603 1645 254 125 1390 502 375 629
NCA-G 150
NCA-G 200 203
NCA-G 300 1390 730 2076 150 1810 629 525 756 47
1340 629 1822 125 1530 527 450 705 50
72
G
Gas connection size
All Units R½
A
SIDE
VIEW
K
L
F
C
J
K
M
M
Table 2 - Performance Data
HIGH FIRE LOW FIRE
INPUT OUTPUT
MODEL
NCA-G 100 33.3 29.3 N/A N/A 0.5192 150 N/A 0.335 N/A 152
NCA-G 150 50.0 44.0 N/A N/A 0.7788 290 N/A 0.55 N/A 215
NCA-G 200 66.9 58.6 N/A N/A 1.0383 200 N/A 0.56 N/A 215
NCA-G 300 100.0 88.0 N/A N/A 1.5575 250 N/A 1.5 N/A 304
(Net) (Net)
kw kw m³/s pa kw kg
INPUT OUTPUT
AIR
VOLUME
MAXIMUM DUCT
RESISTANCE
Standard L.H.P. Standard L.H.P.
FAN MOTOR WEIGHT
Table 3.1 - Burner Pressures - Natural Gas - Group H - G20 - NetCV (Hi) = 34.02MJ/m³
Powrmatic Burners Riello Burners
Type Pressure Pressure Type Pressure Pressure
MODEL
NCA-G 100 PCGS 2 N/A 4.8 GS 5 N/A 4.3 3.40 120.0
NCA-G 150 PCGS 2 N/A 9.9 GS 5 N/A 4.2 5.12 180.8
NCA-G 200 PCGS 3 N/A 12.2 GS 10 N/A 3.7 7.08 250.0
NCA-G 300 PCGS 5 N/A 10.4 GS 10 N/A 5.2 10.89 384.5
Start Gas Main Burner Start Gas Main Burner Gas Rate
mbar mbar mbar mbar m³/h ft³/h
Table 3.2 - Burner Pressures - Propane - G31 - NetCV (Hi) = 88.00MJ/m³
Powrmatic Burners Riello Burners
Type Pressure Pressure Type Pressure Pressure
MODEL
NCA-G 100 PCGS 2 N/A 6.9 GS 5 N/A 3.1 1.31 46.3
NCA-G 150 PCGS 2 N/A 11.3 GS 5 N/A 6.4 1.98 69.9
NCA-G 200 PCGS 3 N/A 20.0 GS 10 N/A 4.1 2.74 96.7
NCA-G 300 PCGS 5 N/A 14.2 GS 10 N/A 8.3 4.21 148.7
Start Gas Main Burner Start Gas Main Burner Gas Rate
mbar mbar mbar mbar m³/h ft³/h
2
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