Varmax floor standing boiler
- Floor standing, high output condensing boiler with a stainless steel heat exchanger.
- The range consists of 10 single boilers with outputs (at 50/30°C) of 127, 148, 191, 238, 290, 338, 415, 478, 558, 637kW.
Product information
Improved efficiency on split temperature systems due to high and low temperature return connections.
Non-dependent on system flow allowing wide differential temperatures.
Easier installation with no requirement for dedicated primary circuit and no minimum flow rates.
Touch screen controls for simple, intuitive set up.
Quick and easy to disassemble with updated casing access, also meaning easier access for maintenance or service.
Tolerant to a wide range of system water conditions with a corrosion resistant stainless steel heat exchanger.
Long life backed up by a 5-year heat exchanger warranty.
Well insulated for low standby losses.
NOx emissions comply with ErP legislation lower than 56mg/kWh.
Match heating system loads accurately with outputs up to 637kW from a single boiler and ability to cascade multiple boilers.
Simplified flue system design as the flue gas non-return valve is built in to provide effective protection from re-circulation of flue gases through non-firing boilers.
Built in boiler sequence controls capable of controlling up to 16 boiler modules, multiple heating circuits and a hot water circuit using the master/slave principle.
Quick release access panels for ease of service and maintenance.
BIM objects available to assist in design and management.
Ideal uses/applications
Split temperature systems such as a combination of radiator loops/air convectors and underfloor heating.
Medium to large sized district heating schemes.
Optional extras
A large range of off the shelf flue options available
Room sealed and open flue solutions
Flue header kits
Single Boiler Controls
Outside air temperature sensor QAC34 (Part no. 533901457)
Domestic Hot Water sensor kit (sensor and pocket) QAZ36 (Part no. 563605674)
Mixing valve heating circuit control kit (AVS 75 control module, temperature sensor and pocket) for 1 zone (Part no. 059751)
Programmable room sensor QAA75 (Part no. 533901587)
Offset adjustable room sensor QAA55 (Part no. 533901589)
Multiple Boiler Controls
Outside air temperature sensor QAC34 (Part no. 533901457)
Heating circuit sensor kit (sensor and pocket) QAZ36 (Part no. 563605673)
Merley boiler sequence controller, wall mounted (Part no. 563605672)
LPB Bus communication module OCI345, one required per boiler module (Part no. 563605667)
Programmable room sensor QAA75 (Part no. 533901587)
Offset adjustable room sensor QAA55 (Part no. 533901589)
Choose from a wide range of service contracts to help maintain optimum performance.
Book commissioning at the same time as placing your order for improved warranty terms.
- Energy
Units
180
225
275
320
390
450
525
600
Building regulations Part L seasonal efficiency
% gross
96.3
96.3
96.2
96.2
96.2
96.2
96.2
96.2
Boiler output - maximum 80/60°C, NG & LPG*
kW
175.9
219.8
269.5
313.6
382.3
441.9
515.6
589.2
Boiler output - maximum 50/30°C, NG & LPG*
kW
191
238
290
338
415
478
558
637
Boiler output - minimum 80/60°C, Nat Gas.
kW
43
43
66
66
87
87
120
120
Boiler input (gross) - maximum, NG & LPG*
kW
180
225
275
320
390
450
525
600
Boiler input (net) - maximum, NG & LPG*
kW
162
203
248
288
351
405
473
541
- Water
Units
180
225
275
320
390
450
525
600
Water content
litres
151
151
239
239
287
287
420
420
System design flow rate @ 30°C ΔT rise
l/s
1.4
1.7
2.1
2.5
3
3.5
4.08
4.69
Water side pressure loss @ 30°C ΔT rise
mbar
25
36
36
53
34
43
60
75
System design flow rate @ 20°C ΔT rise
l/s
2.1
2.6
3.2
3.7
4.6
5.3
6.14
7
Water side pressure loss @ 20°C ΔT rise
mbar
49.5
73.5
110.6
127.3
85
107
107
138
System design flow rate @ 11°C ΔT rise
l/s
3.8
4.7
5.8
6.8
8.3
9.5
11.17
12.77
Water side pressure loss @ 11°C ΔT rise
mbar
188
268
271
393
255
321
335
450
Maximum water pressure
barg
6
6
6
6
6
6
6
6
Maximum flow temperature setting
°C
85
85
85
85
85
85
85
85
- Gas
Units
180
225
275
320
390
450
525
600
Gas flow rate, NG (G20) - maximum
m³/hr
19.1
23.8
29.1
33.9
41.3
47.6
55.6
63.5
Maximum gas inlet pressure, Nat Gas
mbar
25
25
25
25
25
25
25
25
Nominal inlet pressure, Nat Gas
mbar
20
20
20
20
20
20
20
20
- Flue
Units
180
225
275
320
390
450
525
600
Maximum flue gas temperature @ 80/60°C Nat Gas
°C
61
62.3
61.7
63.4
62.5
64.8
64.4
66.6
Pressure at boiler flue spigot @ 80/60°C Nat Gas B23P
Pa
115
165
122
176
180
193
160
200
Dry NOx emission**
mg/kWh
27
27
36
36
32
35
55
55
NOx Class
6
6
6
6
6
6
6
6
- Electrical
Units
180
225
275
320
390
450
525
600
Electrical supply
230V, 1Ph, 50Hz
230V, 1Ph, 50Hz
230V, 1Ph, 50Hz
230V, 1Ph, 50Hz
230V, 1Ph, 50Hz
230V, 1Ph, 50Hz
230V, 1Ph, 50Hz
230V, 1Ph, 50Hz
Power consumption - maximum boiler modulation
W
228
330
326
427
545
717
729
970
Approx shipping weight
kg
393
393
502
502
592
592
800
800
Noise emission @1m: @max. modulation
dB (A)
76
76
77
77
84
89
82
84