Riello RL 28/2 - Technical Data; Burner Models; Accessories

3
TECHNICAL DATA
(1) Reference conditions: Ambient temperature 68° F (20° C) - Barometric pressure 394” WC - Altitude 329 ft.
(2) Sound pressure measured in manufacturers combustion laboratory, with burner operating on test boiler and at maximum rated output.
(3) Equivalent Btu values based on 1 USGPH = 140,000 Btu/hr.
Burner models designations
ACCESSORIES (optional):
• Kit for lengthening the combustion head
L = Standard length
L1 = Length obtainable with the kit
COD. 3010250 L = 8
1
/
2
“ L1 = 13
13
/
16
“ • RL 28/2
COD. 3010251 L = 8
1
/
2
“ L1 = 13
13
/
16
“ • RL 38/2
COD. 3010252 L = 8
1
/
2
“ L1 = 13
13
/
16
“ • RL 50/2
MODEL RL 28/2 RL 38/2 RL 38/2 RL 50/2 RL 50/2
Output
(1)
Delivery
(1)
High
fire
MBtu/hr
(3)
630 - 1260 896 - 1708 896 - 1708 1120 - 2240 1120 - 2240
GPH 4.5 - 9 6.4 - 12.2 6.4 - 12.2 8 - 16 8 - 16
Low
fire
MBtu/hr
(3)
364 - 630 448 - 896 448 - 896 560 - 1120 560 - 1120
GPH 2.6 - 4.5 3.2 - 6.4 3.2 - 6.4 4 - 8 4 - 8
Fuel # 2 Fuel oil
Operation Low - high
Nozzles number 2
Standard applications Hot water, steam, thermal oil
Ambient temperature °F 32 - 104 (0 - 40 °C)
Combustion air temperature °F max 140 (60 °C)
Main power supply (+/- 10 %) V/Ph/Hz 120/1/60 208-230 / 460 / 575 / 3 / 60 120-230/1/60
Fan motor rpm
W - HP
V
A
3400
370 - 0.5
120
5.2
3400
550 - 0.75
208 - 230 / 460 / 575
3.2 - 1.6 - 1.3
3400
550 - 0.75
120 - 230
9.8 - 4.9
Motor capacitor µF 45 20
Ignition trasformer V1 - V2
I1 - I2
120 V - 2 x 5 kV
3.7 A - 35 mA
Pump delivery (174
PSI)
pressure range
GPH
PSI
22
60 - 260
Electrical power consumption W max 550 600 700 750 700
Electrical protection NEMA 1
Noise levels
(2)
dBA 68.0 70.0 70.0 75.0 75.0
Model Code Voltage Flame safeguard
RL 28/2 C9511200 (3473270) 120/1/60 Burner mounted
RL 38/2
C9512200 (3474170)
C9512250 (3474370)
C9512251 (3474370)
120/1/60
208-230/460/3/60
575/3/60
Burner mounted
Burner mounted
Burner mounted
RL 50/2
C9513200 (3474670)
C9513201 (3474670)
(3474675)
208-230/460/3/60
575/3/60
120-230/1/60
Burner mounted
Burner mounted
Burner mounted
Important:
The installer is responsible for the supply and installation of any safety device(s) not indicated in this manual.